Question

please answer me ques-cos(81°-∅) = sin (9°-∅) i mark him as a branliest and give 5 stars rating god promise guys

Answer 1

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Answer 2

Step-by-step explanation:

cos(81+∅)=cos(90-9+∅)

=cos[90-(9-∅)]

=cos(90-θ) [let (9-∅)=θ]

=sin(θ)

=sin(9-∅)

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