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anonymous
 4 years ago
Verify the identity.
sin (x + y)  sin (x  y) = 2 cos x sin y
anonymous
 4 years ago
Verify the identity. sin (x + y)  sin (x  y) = 2 cos x sin y

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anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Does it matter from which side you work from?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0no i dont think so but i need to know what to do step by step plz

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Do you know the formula sin(a+b)=sinacosb+cosasinb?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Give me like 5 min. I'll write it out.
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