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Proving Trigonometric identities

Proving Trigonometric identities

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#If your post has been solved, please type Solved! or manually set your post flair to solved. **Title:** [Proving Trigonometric identities](https://www.reddit.com/r/cheatatmathhomework/comments/o2qzl0/proving_trigonometric_identities/) **Full text:** How do you prove these identities? (1-cos2α)×cos(450°+2α)×2sin22α-sin4α=√24 tgα -------------------- ^(To help preserve questions and answers, this is an automated copy of the original text.) *I am a bot, and this action was performed automatically. Please [contact the moderators of this subreddit](/message/compose/?to=/r/cheatatmathhomework) if you have any questions or concerns.*