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Left hand side identity =

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Apply hàng hóa rule in derivatives

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In this case

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Apply double angle formula

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= Right hand side identity.

answeredJul 21, 2014by davidExpert Please log in or register to địa chỉ a comment. Related questionsif given the tan2x, find sin2x without using a double formulaaskedNov 26, 2013in TRIGONOMETRYby futaiScholardouble-angle Prove that (cos x + i sin x)^2 = cos2x + i sin2xaskedOct 25, 2014in PRECALCULUSby anonymouscomplex-numbers find sin2x, cos2x, and tan2x if tanx=1/2 in quadrant 1askedOct 21, 2018in TRIGONOMETRYby anonymousdouble-angle area between y=sin2x and y=2sinxaskedJan 16, 2017in CALCULUSby anonymousarea Prove cos^2(45 degrees+x)-sin^2(45degrees+x)= -sin2x?askedAug 22, 2015in TRIGONOMETRYby anonymoustrigonometric-functionstrigonometric-identities The integral of Sin2x/ 1 + cos^2 dxaskedNov 13, 2014in CALCULUSby anonymousintegration The range of F(x) = sin2x + 1 is _____.askedAug 11, 2014in TRIGONOMETRYby anonymousrange-of-a-function integration of log(1/2 sin2x)askedFeb 17, 2014in CALCULUSby harvy0496Apprenticeintegrationdefinite-integral u=sin2x cos3yaskedDec 7, 2013in CALCULUSby johnkellyApprenticepartial-fraction integration of log(1/2 sin2x)askedDec 4, 2013in CALCULUSby angel12Scholardefinite-integralintegration sin2x+cos x=cos x(2sinx+1)askedNov 30, 2013in TRIGONOMETRYby futaiScholartrigonometric-identities How khổng lồ solve Sin2x + 3Cos2x = 0 ?askedApr 12, 2013in TRIGONOMETRYby homeworkhelpMentortrignometric-equations Find sin2x, cos2x, tan2xaskedFeb 13, 2013in TRIGONOMETRYby chrisgirlApprenticedouble-angle What is the area between y=sin2x và y=cosx?askedJan 19, 2013in CALCULUSby rockstarApprenticedefinite-integralareas