Math, asked by Rahul1472, 1 year ago

cos55° +cos65° +cos175° = 0

Answers

Answered by Sanskriti101199
5
heya friend!!☺☺
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here's your answer!!☺☺

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hope it helps you!!☺☺
Attachments:

Rahul1472: in 2 nd line not understand 120/2 or
Rahul1472: which formula
Anonymous: cosA+cosB=2cosA+B/2cosA-B/2 , WHERE A and B are ANGLES
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