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Dockworker Group TitleBest ResponseYou've already chosen the best response.0
you want to get the reference angle, that is the first quadrant angle that has the same value, maybe varying only by sign
 2 years ago

Dockworker Group TitleBest ResponseYou've already chosen the best response.0
we know the sign is positive in the 2nd quadrant and in the first quadrant
 2 years ago

Dockworker Group TitleBest ResponseYou've already chosen the best response.0
of sine, that is
 2 years ago

Dockworker Group TitleBest ResponseYou've already chosen the best response.0
so this question is the exact same thing as sin(3pi/4pi/2)
 2 years ago

Dockworker Group TitleBest ResponseYou've already chosen the best response.0
which is sin(pi/4)
 2 years ago

Dockworker Group TitleBest ResponseYou've already chosen the best response.0
think of the unit circle with radius 1, what would the yvalue need to be with respect to the radius for theta to be pi/4?
 2 years ago

Mertsj Group TitleBest ResponseYou've already chosen the best response.1
dw:1333508390565:dw So \[\sin\frac{3\pi}{4}=\sin\frac{\pi}{4}=\frac{\sqrt{2}}{2}\]
 2 years ago
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