Math, asked by AVINAB786, 4 months ago

Prove that:
cos (44°-A).cos (44°+A)+cos (46°-A).cos (46°+A)=2cosA

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Answered by narayantudut

0

Step-by-step explanation:

Prove that:

cos (44°-A).cos (44°+A)+cos (46°-A).cos (46°+A)=2cosA

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