Question

sin-¹=3/5=A then find cos A​

Answer 1

Answer:

Sin-¹ = 3/5

Sin A = 3/5

We know that, Sin A = P/H

Therefore, P = 3 and H = 5

Using, Pythagoras Theorem

H² = P² + B²

5² = 3² + B²

25-9 = B²

16 = B²

B =4.

Cos A = Base/Hypotenuse

Cos A = 4/5