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OpenStudy (anonymous):
sin2cos1+cos2sin1 = ?
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OpenStudy (anonymous):
@sami-21
OpenStudy (anonymous):
since \[\Large sin(a+b)=sin(a)cos(b)+cos(a)sin(b)\] so here a=2 b=1 i hope you can find it now !!
OpenStudy (anonymous):
thank you so much! :)
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