Question

If sin c = 15÷7 then find cos c​

Answer 1

Answer:

8/17

Step-by-step explanation:

Given sin C=15/17=opposite side/hypotenuse

Let the adjacent side be 'x' .

As, (hypotenuse)²=(opposite side)²+(adjacent side)²  by Pythagoras theorem.

(17)²=(15)²+(x)²

Or, x²=(17)²-(15)²

Or, x²=289-225

Or, x²=64

Or, x=√64

Or, x=8

Now, Cos C=adjacent side/hypotenuse

Therefore Cos C=8/17

Hope this helps :)