If :- Sin(theta) + sin^2(theta) = 1 then prove that :- cos^2(theta) + cos^4(theta) = 1
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Originally Posted by rickymylv If :- Sin(theta) + sin^2(theta) = 1 then prove that :- cos^2(theta) + cos^4(theta) = 1 sin(θ) + sin^2(θ) = 1 sin(θ)=1 - sin^2(θ) = cos^2(θ) So sin^2(θ) = cos^4(θ) Substitute it in the second equation to get the result.
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