Evaluate the function requested. Write your answer as a fraction in lowest terms. 21
35
В
28
Find sin A.
а.
4
sin A =
3
c.
sin A =
b.
d.
4
sin A =
5
5
sin A =
4

 4 / 5

Step-by-step explanation: 1) For a right triangle, the ratio sine is defined as:

sin(x) = opposite-leg / hypotenuse

2) x is the angle. In this case: A

3) As per the figure, the opposite leg to tha angle A measures 28

4) As per the figure, the hypotenuse measures 35

5) Calculations:

sin(A) = 28 / 35

Simplify dividing both numerator and denominator by 7 => 28/35 = 4/5

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