Math, asked by sahilthakkar14, 1 month ago

in triangle ABC , A+B+C=π show that , cos 2A + cos2B+ cos2C = -1-4 cosA . cosB.cosC

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Answered by nahakswapnil311

28

Answer:

ʜᴇʀᴇ ɪs ᴜʀ ᴀɴsᴡᴇʀ

ʜᴏᴘᴇ ɪᴛ ᴡɪʟʟ ʜᴇʟᴘ ᴜ

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