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lilsis76
 4 years ago
us addition formulas for Sin & Cos to simplify the expressions.
instructors instruction: LET S=45, T=30
cos 2u cos 3u  sin 2u sin 3u
lilsis76
 4 years ago
us addition formulas for Sin & Cos to simplify the expressions. instructors instruction: LET S=45, T=30 cos 2u cos 3u  sin 2u sin 3u

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lilsis76
 4 years ago
Best ResponseYou've already chosen the best response.0I know for cosine its..... cos(s+t)=cos S cos T  sin S cos T does that mean i have to put the 2u or just a 2?

lilsis76
 4 years ago
Best ResponseYou've already chosen the best response.0oh im sorry UGH! dumb teacher instructions. since S is 45 and T is 30....i fill those in? Am i trying to find cos and sin? or just sin?
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