Math, asked by jennidasari, 10 months ago

Prove that cos(60+A) +cos(60-A)=cosA

Answers

Answered by BearAngle091988

0

Answer:

Step-by-step explanation:

I assume the problem involves proving the identity. If so, we proceed as follows: Using trig identities, we can write cos(60 +A)+cos(60 -A)-cosA =

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