Just Ask Berleaf:
Solving with Algebra (Part #1)

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JUST ASK BERLEAF is an educational series by Berleaf Education that aims to share knowledge and learning hacks with passionate learners around the world.

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[/vc_column_text][vc_separator][/vc_column][vc_column width=”2/3″ css=”.vc_custom_1691990052287{padding-right: 15px !important;padding-left: 15px !important;}”][vc_custom_heading text=”Solving with Algebra (Part #1)” font_container=”tag:h4|font_size:2.2em|text_align:left|color:%23708e96″ google_fonts=”font_family:Oswald%3A300%2Cregular%2C700|font_style:400%20regular%3A400%3Anormal” css=”.vc_custom_1692171557011{margin-bottom: 0px !important;padding-left: 8px !important;}”][vc_column_text css=”.vc_custom_1692072756420{padding-top: 8px !important;padding-right: 10px !important;padding-bottom: 20px !important;padding-left: 10px !important;}”]

Suitable for: Primary 6 and above
Prerequisite: Algebra

[/vc_column_text][vc_separator][ultimate_spacer height=”25″][vc_custom_heading text=”Methods to Solving Patterns & Number Sequence” font_container=”tag:h4|font_size:1.8em|text_align:left|color:%238fb4bf” google_fonts=”font_family:Oswald%3A300%2Cregular%2C700|font_style:400%20regular%3A400%3Anormal” css=”.vc_custom_1692072968756{margin-bottom: 0px !important;padding-bottom: 8px !important;padding-left: 10px !important;}”][vc_column_text css=”.vc_custom_1692061571555{padding-top: 0px !important;padding-right: 10px !important;padding-bottom: 20px !important;padding-left: 10px !important;}”]These angles are commonly used in trigonometric problems and their corresponding Trigo ratio can be easily remembered just by using…your left hand![/vc_column_text][vc_single_image image=”1052″ img_size=”full” css=”.vc_custom_1692061314900{padding-bottom: 15px !important;}”][ultimate_spacer height=”15″][vc_custom_heading text=”Getting Started” font_container=”tag:h4|font_size:1.8em|text_align:left|color:%238fb4bf” google_fonts=”font_family:Oswald%3A300%2Cregular%2C700|font_style:400%20regular%3A400%3Anormal” css=”.vc_custom_1692061772983{margin-bottom: 0px !important;padding-bottom: 8px !important;padding-left: 10px !important;}”][vc_column_text css=”.vc_custom_1692066718956{padding-top: 0px !important;padding-right: 10px !important;padding-bottom: 20px !important;padding-left: 10px !important;}”]Starting with your pinky, your fingers represent 0, 30, 45, 60 and 90 degrees respectively.[/vc_column_text][vc_single_image image=”1053″ img_size=”full” css=”.vc_custom_1692061620435{padding-bottom: 15px !important;}”][vc_column_text css=”.vc_custom_1692068701408{padding-top: 0px !important;padding-right: 10px !important;padding-bottom: 20px !important;padding-left: 10px !important;}”]Example
Find the value for each of the following:

Sin 30°
Cos 30°
Tan 30°

Step 1: Bending fingers

To find the Trigonometric Value, first, bend the finger that represents the special angle which in our example is 30 degree[/vc_column_text][vc_single_image image=”1054″ img_size=”full” css=”.vc_custom_1692063546665{padding-bottom: 15px !important;}”][ultimate_spacer height=”15″][vc_column_text css=”.vc_custom_1692068709560{padding-top: 0px !important;padding-right: 10px !important;padding-bottom: 20px !important;padding-left: 10px !important;}”]

Step 2: Count your fingers with the relevant formula

For Sine
Count the number of fingers below your bent finger and simply square root that number and divide it by 2 to get the value of your Trigo ratio.[/vc_column_text][vc_single_image image=”1055″ img_size=”full” css=”.vc_custom_1692061693772{padding-bottom: 15px !important;}”][vc_single_image image=”1056″ img_size=”full” css=”.vc_custom_1692067672069{padding-bottom: 15px !important;}”][vc_column_text css=”.vc_custom_1692068273015{padding-top: 0px !important;padding-right: 10px !important;padding-bottom: 20px !important;padding-left: 10px !important;}”]Et viola! We have got sin 30° = 1/2![/vc_column_text][vc_column_text css=”.vc_custom_1692068204397{padding-top: 0px !important;padding-right: 10px !important;padding-bottom: 20px !important;padding-left: 10px !important;}”]For Cosine
Count the fingers above your bent finger, square root that number and divide it by 2 to get the value of your trigonometric ratio.[/vc_column_text][vc_single_image image=”1057″ img_size=”full” css=”.vc_custom_1692068294555{padding-bottom: 15px !important;}”][vc_single_image image=”1058″ img_size=”full” css=”.vc_custom_1692068307525{padding-bottom: 15px !important;}”][vc_column_text css=”.vc_custom_1692068361190{padding-top: 0px !important;padding-right: 10px !important;padding-bottom: 20px !important;padding-left: 10px !important;}”]Et viola! We have got cos 30° = (sqrt 3)/2![/vc_column_text][vc_column_text css=”.vc_custom_1692068427760{padding-top: 0px !important;padding-right: 10px !important;padding-bottom: 20px !important;padding-left: 10px !important;}”]For Tangent
While keeping your fingers bent, flip over to your backhand.
Then square root the number of fingers above the bent finger and divide it with the square root of the number of fingers below[/vc_column_text][vc_single_image image=”1059″ img_size=”full” css=”.vc_custom_1692068451851{padding-bottom: 15px !important;}”][vc_single_image image=”1060″ img_size=”full” css=”.vc_custom_1692068459903{padding-bottom: 15px !important;}”][vc_column_text css=”.vc_custom_1692068474738{padding-top: 0px !important;padding-right: 10px !important;padding-bottom: 20px !important;padding-left: 10px !important;}”]Then square root the number of fingers above the bent finger and divide it with the square root of the number of fingers below.[/vc_column_text][vc_single_image image=”1062″ img_size=”full” css=”.vc_custom_1692068499131{padding-bottom: 15px !important;}”][vc_single_image image=”1063″ img_size=”full” css=”.vc_custom_1692068508580{padding-bottom: 15px !important;}”][vc_column_text css=”.vc_custom_1692068537693{padding-top: 0px !important;padding-right: 10px !important;padding-bottom: 20px !important;padding-left: 10px !important;}”]Et viola! We have got tan 30° = 1/sqrt 3![/vc_column_text][ultimate_spacer height=”15″][vc_custom_heading text=”That’s All For Now!” font_container=”tag:h4|font_size:1.8em|text_align:left|color:%238fb4bf” google_fonts=”font_family:Oswald%3A300%2Cregular%2C700|font_style:400%20regular%3A400%3Anormal” css=”.vc_custom_1691986882322{margin-bottom: 0px !important;padding-bottom: 8px !important;padding-left: 10px !important;}”][vc_column_text css=”.vc_custom_1691987022542{padding-top: 15px !important;padding-bottom: 15px !important;padding-left: 10px !important;}”]

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