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Example1

Title: Trigonometry ratios in right triangles

Grade Lesson s5-l2

Explanation: The best way to understand SAT-4 is by looking at some examples. Take turns and read each example for easy understanding.

Examples

Topics → Definition Example1

Find sin(a) in △ABC given below:

$1$

Step: 1

The formula of sine: sine is defined as the ratio of the opposite to the hypotenuse sin (a) = \$(opposite)/(hypotenuse)\$.

Find the values of the opposite side and hypotenuse side.sin(a) = \$(BC)/(AB)\$.

Substitute the values: BC = 4 and AB = 3

sin a = \$4/3\$

So, the value of sina = \$4/3\$.

Explanation:

Use the sine formula and substitute the given value to obtain the value of \$sina = 4/3\$.