Question

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

Answer 1

Answer:

we know that sin theta =perpendicular/hypotaneous.

So, here a is perpendicular and b is hypotaneous.

Now, we also know that (hypotaneous)^2=(base)^2 + (perpendicular)^2. Therefore from here we get base= √(hypotaneous)^2-(perpendicular)^2.

Now, cos theta = base/hypotaneous.

Therefore, cos theta = (√b^2 - a^2)/b

Step-by-step explanation:

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