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catgirl17
Group Title
evaluate the expression without using a calculator.
sin 30 cos 60 + sin 60 cos 30
 one year ago
 one year ago
catgirl17 Group Title
evaluate the expression without using a calculator. sin 30 cos 60 + sin 60 cos 30
 one year ago
 one year ago

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franciscanmonk Group TitleBest ResponseYou've already chosen the best response.0
sin 30 cos 60 + sin 60 cos 30 Sin 30 = 1/2 cos 60 = 1/2 sin 60 = sqrt(3)/2 cos 30 = sqrt(3)/2 ((1/2)(1/2)) + (sqrt(3)/2)^2 (1/4)+ (sqrt(3)/2)^2
 one year ago

catgirl17 Group TitleBest ResponseYou've already chosen the best response.0
so would that be the answer?
 one year ago

hartnn Group TitleBest ResponseYou've already chosen the best response.3
instead u can use sinA cos B +cos A sinB = sin (A+B) so your expression is sin (30+60) = sin 90 = 1
 one year ago

catgirl17 Group TitleBest ResponseYou've already chosen the best response.0
@franciscanmonk is that my answer?
 one year ago

Chlorophyll Group TitleBest ResponseYou've already chosen the best response.0
@catgirl17 Learn the formula! @franciscanmonk it's great review for you :)
 one year ago

franciscanmonk Group TitleBest ResponseYou've already chosen the best response.0
haha. yeah i thought there was a way to simplify that. and i couldnt get a hold of it.
 one year ago

hartnn Group TitleBest ResponseYou've already chosen the best response.3
did u get that formula ? @catgirl17 and yes final answer is 1.
 one year ago
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