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

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

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

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

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