What is the general solution for 2cos^2(x)+2=4 ?

The general solution for 2cos^2(x)+2=4 is x=2pin,x=pi+2pin

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2cos^2(x)+2=4

2 cos^{2} (x) + 2 = 4

x = 2 πn, x = π + 2 πn

Solution steps

2 cos^{2} (x) + 2 = 4

Solve by substitution

cos (x) = 1, cos (x) = - 1

cos (x) = 1 : x = 2 πn

cos (x) = - 1 : x = π + 2 πn

Combine all the solutions

x = 2 πn, x = π + 2 πn

sin (z) = 3

3 sin (\frac{θ}{2}) + sin (θ) = 0

2 sin (x) cos (x) sin (x) = cos (x)

- 6 csc^{2} (x) + 10 cot (x) = - 10

x, cos (x) - cos (y) = 0

What is the general solution for 2cos^2(x)+2=4 ?
The general solution for 2cos^2(x)+2=4 is x=2pin,x=pi+2pin