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sin(ab) = sinacosb+cosasinb for all values of a and b. True or false?
 one year ago
 one year ago
sin(ab) = sinacosb+cosasinb for all values of a and b. True or false?
 one year ago
 one year ago

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g152xxBest ResponseYou've already chosen the best response.2
It should be sin(a  b) = sin(a)cos(b)  cos(a)sin(b)
 one year ago

g152xxBest ResponseYou've already chosen the best response.2
Let's do it this way to evidence more: sin(a  b) = sin(a)cos(b)  sin(b)cos(a) sin(a + b) = sin(a)cos(b) + sin(b)cos(a) SO, cos(a  b) = cos(a)cos(b) + sin(a)sin(b) cos(a + b) = cos(a)cos(b)  sin(a)sin(b) Simple.
 one year ago

g152xxBest ResponseYou've already chosen the best response.2
Thank you very much @Spectrum.
 one year ago
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