Question

1-2 sin? e + sint o = coste​

Answer 1

Answer:

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Step-by-step explanation:

1-2sinθ+sinθ=cosθ

=1-sinθ=cosθ

=(1-sinθ)²=cos²θ

=1+sin²θ-2 sinθ = 1-sin²θ

=sin²θ+sin²θ=2 sinθ

=2 sin²θ=2 sinθ

=sinθ=sin²θ

So, θ=0 or 90