Question

1- sin 2 theta - cos 2 theta

Answer 1

Answer:

(1 - sin²theta) - cos²theta

cos²theta - cos²theta

= 0

Answer 2

Answer:

$1 - sin {}^{2} \alpha - cos {}^{2} \alpha \\ 1 - (sin {}^{2} \alpha + cos {}^{2} \alpha ) \\ 1 - 1 \\ = 0$

Hope this will help you.

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