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Mathematics 10 Online
OpenStudy (itiaax):

Can anyone help me simplify the following trigonometric expressions?

OpenStudy (itiaax):

\[a) \cos \left( \theta-60 \right)+\cos \left( \theta+60 \right)\] \[b) \sqrt{3} cosx-\sin(x+60)-\sin(x+120)\]

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