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wio
 2 years ago
Best ResponseYou've already chosen the best response.1Split it up into \[ \sin(8\pi/2 + 3\pi/2) = \sin(4\pi + 3\pi/2) \]Then use: \[ \sin(x+y) = \sin(x)\cos(y)+\sin(y)\cos(x) \]

starburst.t95
 2 years ago
Best ResponseYou've already chosen the best response.0Why do you split it up?

wio
 2 years ago
Best ResponseYou've already chosen the best response.1Because you can find the exact value for angles \(4\pi\) and \(3\pi/2\) very easily.

campbell_st
 2 years ago
Best ResponseYou've already chosen the best response.1because of the cyclic nature of sin(x) you just need to find \[\sin(\frac{3\pi}{2})\]
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