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Solve for x if cos(2x+60)=-1
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Solve for x if cos(2x+60)=-1

User Azarsa
by
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1 Answer

3 votes

Answer:

x = 60°

Explanation:


\cos \: (2x + 60) = - 1 \\ \cos \: (2x + 60) = \cos \: 180 \degree \\ 2x + 60 = 180 \degree \\ 2x = 180 \degree - 60 \degree \\ 2x = 120 \\ x = (120)/(2) \\ \huge \red{ \boxed{ x = 60 \degree}}

User Andreas Bigger
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