Math, asked by angelina231, 8 months ago

cos^2A + cos^2 B - 2 cos A cos B cos (A+B) =
sin^2 (A + B)

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Answered by sprao53413

2

Answer:

Please see the attachment

Attachments:

Answered by souravsarkar045

1

Answer:

Here is the proof.... check it.

Attachments:

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