Question

sin theta + cos theta is equals to 1 + sin 2theta

Answer 1

Hey Divya
your answer is here
by squaring both sides we get

sin^2+cos^2+2sin.cos = 1+sin^2(2theta)+2sin(2theta)

we know that
sin^2+cos^2 = 1 nd
2sin.cos = sin(2theta)
so, 1+sin(2theta) = 1+2sin(2theta)+sin^2(2theta)
sin(2theta) = -sin^2(2theta)
sin(2theta) = 0 ya
sin(2theta) = -1

Hope this help you

Thanks

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