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Mathematics
Snake
12 September, 15:54
Cos^2 2A+4sin^2A*cos^2 A=1
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Rubi Gardner
12 September, 16:53
0
Using Sin^2 and Cos^2 identities,
= Cos^2 (2A) + 4[ (1/2) (1-Cos (2A) ][ (1/2) (1+Cos (2A) ] = 1
= Cos^2 (2A) + 1 - Cos^2 (2A) = 1
0 = 0
There is nothing to solve for as it is an identity of sorts.
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