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OpenStudy (anonymous):
(Sinx-cosx)^2=2
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OpenStudy (gorv):
expand it
OpenStudy (gorv):
sin^2x+cos^2x-2*sinx*cosx
OpenStudy (gorv):
sin^2x+cos^2x =1
OpenStudy (gorv):
1-2sinxcosx=2
OpenStudy (gorv):
subtract 1 from each side
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OpenStudy (gorv):
-2sinxcosx=2-1
OpenStudy (gorv):
-2sinxcosx=1
OpenStudy (gorv):
2sinxcosx=sin2x
OpenStudy (gorv):
-sin2x=1 or sin2x=-1
OpenStudy (gorv):
hope you you know what to do
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OpenStudy (anonymous):
Yea thanks
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