Question

given that sin theta is equal to a b find cos theta​

Answer 1

Answer:

sin theta = ab

cos theta = $\sqrt{1-a^{2}b^{2} }$ is the answer

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Answer 2

Given, sinθ=ab [∴sin2θ+cos2θ=1⇒cosθ=1−sin2θ−−−−−−−−√]

∴cosθ=1−sin2θ−−−−−−−−√

=1−(ab)2−−−−−−−−√=1−a2b2−−−−−−√=b√2−a2b