May 2021 1 54 Report
Verify the identity using double-angle formulas: 1 - 4sin²x cos²x = cos²2x?

Show me how to do this. I don't understand how to simplify the 1 - 4sin²x

cos 2u = 1 - 2sin²u this is the formula I am using for this idk what to do when there is 4sin²x

Science & Mathematics / Mathematics
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