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View Full Version : Verify cos^2(2t)+4sin^2(t) = 4sin^4(t)+1

Dan0655
Apr 15, 2013, 10:31 AM
Math problem
ebaines
Apr 15, 2013, 11:24 AM
Hints:

(sin^2t + cos^2t)^2 = 1

cos^2(2t) = (cos^2t - sin^2t)^2