Math, asked by harshitakalra3737, 11 months ago

please solve this...
and give step by step explanation...
IF YOU'LL EXPLAIN WELL... I'LL MARK YOU AS THW BRANLIEST:)

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Answers

Answered by sandy1816

1

Step-by-step explanation:

cos²(45+θ)+cos²(45-θ)

=2cos²45cos²θ

=2.(1/2)cos²θ

=cos²θ

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