prove that cos(81°-∅)=sin(9°-∅) please answer me fast i mark him as a branliest and give 5 stars rating please tell me fast
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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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