Question

if sin theta is equal to a/b,find cos theta​

Answer 1

Answer:

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Answer 2

Answer:

cosθ=√(b²-a²)/b

Step-by-step explanation:

Sinθ=a/b

∴, cosθ=√(1-sin²θ) [∵, sin²θ+cos²θ=1]

or, cosθ=√(1-a²/b²)

or, cosθ=√{(b²-a²)/b²}

or, cosθ=√(b²-a²)/b Ans