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OpenStudy (anonymous):
sin ( a+ b)- sin (a-b)= 2 cos a sin B show work. help me please
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jimthompson5910 (jim_thompson5910):
hints: sin(a+b) = sin(a)cos(b) + cos(a)sin(b) sin(a-b) = sin(a)cos(b) - cos(a)sin(b)
OpenStudy (anonymous):
thank you :)
jimthompson5910 (jim_thompson5910):
you're welcome
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