Here's the question you clicked on:
catgirl17
evaluate the expression without using a calculator. sin 30 cos 60 + sin 60 cos 30
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
so would that be the answer?
instead u can use sinA cos B +cos A sinB = sin (A+B) so your expression is sin (30+60) = sin 90 = 1
@franciscanmonk is that my answer?
@catgirl17 Learn the formula! @franciscanmonk it's great review for you :)
haha. yeah i thought there was a way to simplify that. and i couldnt get a hold of it.
did u get that formula ? @catgirl17 and yes final answer is 1.