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Please prove:
2sinx+sin2x = 2sin^3(x)/1-cosx
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prove:
2sinx+sin2x = 2sin^3(x)/1-cosx
2 answers
hey, i would really appreciate some help solving for x when:
sin2x=cosx Use the identity sin 2A = 2sinAcosA so: sin 2x = cos x
0 answers
Prove:
sin2x / 1 - cos2x = cotx My Attempt: LS: = 2sinxcosx / - 1 - (1 - 2sin^2x) = 2sinxcosx / - 1 + 2sin^2x = cosx / sinx - 1 =
5 answers
sin2x+cosx=0 , [-180,180)
= 2sinxcosx+cosx=0 = cosx(2sinx+1)=0 cosx=0 x1=cos^-1(0) x1=90 x2=360-90 x2=270 270 doesn't fit in
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