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ElleCullen
 one year ago
sin(a  b) = sina cosb + cosa sinb for all values of a and b. True or false?
ElleCullen
 one year ago
sin(a  b) = sina cosb + cosa sinb for all values of a and b. True or false?

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student_basil
 one year ago
Best ResponseYou've already chosen the best response.1false, because the rules for sine a+b identities are. \[\sin(a +b) = \sin(a) ~\cos(b) + \cos(a) ~\sin(b)\]\[\sin(a b) = \sin(a) ~\cos(b)  \cos(a) ~\sin(b)\]

student_basil
 one year ago
Best ResponseYou've already chosen the best response.1you have two of them mixed, and two sides are for sure not always equal.

student_basil
 one year ago
Best ResponseYou've already chosen the best response.1\(\normalsize\color{black}{ \bf You}\) \(\normalsize\color{black}{ \bf welcome~!}\)
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