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OpenStudy (anonymous):
Simplify the expression by using a Double-Angle Formula or a Half-Angle Formula. HELPP PLEASE!! (a) square root 1 − cos 20°/2 (b) square root 1 − cos 10θ/2
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OpenStudy (anonymous):
use 1-cos2x= 2(sin x)^2
OpenStudy (anonymous):
Is that the easiest way of doing it?
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