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OpenStudy (zab505):
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OpenStudy (zab505):
OpenStudy (zab505):
@study100
OpenStudy (anonymous):
see sin(x+y)=sinXcosY+cosXsinY and sin(X-Y)=sinXcosY-cosXsinY now add them up and divide by two...and see what comes..true or false..
OpenStudy (zab505):
False?
OpenStudy (zab505):
@zaibali.qasmi
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OpenStudy (anonymous):
yes...exatly...
OpenStudy (zab505):
Thank you!
OpenStudy (anonymous):
u welcome..
OpenStudy (zab505):
It was wrong
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