Question

Given that sin theta =a/b, then cos theta is equal to​

Answer 1

Answer:

Step-by-step explanation:

sin theta= a/b

we know that sin²theta + cos²theta =1

so Putting value of sin theta=a/b in above equation we get.

(a/b)²+cos² theta=1

cos²theta=1-a²/b²

               =(b²-a²)/b²

So Answer of cos theta= √(b²-a²)/b