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OpenStudy (anonymous):
If f(θ) = sin θ = 0.1, find f(θ+π)
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OpenStudy (anonymous):
use sum formula... sin(a+b) = (sin a)(cos b) + (sin b)(cos a)
OpenStudy (anonymous):
There should be a simpler way. When I use the arc sin function on the calculator ( sin^-1 (.1) I get .1. The answer is -.1. Can you explain to me this?
OpenStudy (mertsj):
Trig identity: sin(x+180)=-sinx
OpenStudy (mertsj):
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OpenStudy (mertsj):
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