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pshichka [43]
3 years ago
14

How do I solve 2cos(x)=2sin(2x)

Mathematics
1 answer:
Vedmedyk [2.9K]3 years ago
4 0
2cosx=2sin2x. Sin2x is an identity for 2sinxcos. So 2[2sinxcosx] gives you 4sinxcosx. 2cosx=4sinxcosx. Divide 2cosx on both sides and gives you 2sinx=0 and divide again, sinx=0. Sinx is 0 at 0 and 360 degrees, or pi and 2pi. So thats what x would be. 0,360,pi,2pi.
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