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

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franciscanmonk
 3 years ago
Best ResponseYou've already chosen the best response.0sin 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

catgirl17
 3 years ago
Best ResponseYou've already chosen the best response.0so would that be the answer?

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

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

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

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

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