What is the general solution for 2+2cos(2x)=0 ?

The general solution for 2+2cos(2x)=0 is x= pi/2+pin

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2+2cos(2x)=0

2 + 2 cos (2 x) = 0

x = \frac{π}{2} + πn

Solution steps

2 + 2 cos (2 x) = 0

Move

2

to the right side

2 cos (2 x) = - 2

Divide both sides by

2

cos (2 x) = - 1

General solutions for

cos (2 x) = - 1

2 x = π + 2 πn

Solve

2 x = π + 2 πn : x = \frac{π}{2} + πn

x = \frac{π}{2} + πn

cot (θ) = - 0.9

csc (x) - 2 cot (x) = 0

\frac{1}{2} - cos (x) = 0

cos^{2} (x) - sin (x) cos (x) = 0

cos (θ) sin (θ) = 1

What is the general solution for 2+2cos(2x)=0 ?
The general solution for 2+2cos(2x)=0 is x= pi/2+pin