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OpenStudy (anonymous):
Verify the identity sin(pi/2-x)=sin(pi/2+x)
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OpenStudy (alekos):
lhs=sin(pi/2 - x) = sin pi/2cosx - sinxcospi/2 = cosx rhs= sin(pi/2+x) = sinpi/2cosx + sinxcospi/2 = cosx sinpi/2=1 and cospi/2=0
OpenStudy (anonymous):
thank you!
OpenStudy (alekos):
no problem
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