What is the general solution for 2cos(x)-4=0 ?

The general solution for 2cos(x)-4=0 is No Solution for x\in\mathbb{R}

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2cos(x)-4=0

2 cos (x) - 4 = 0

No Solution for x \in R

Solution steps

2 cos (x) - 4 = 0

Move

4

to the right side

2 cos (x) - 4 = 0

Add

4

to both sides

2 cos (x) - 4 + 4 = 0 + 4

Simplify

2 cos (x) = 4

2 cos (x) = 4

Divide both sides by

2

2 cos (x) = 4

Divide both sides by

2

\frac{2 cos ( x )}{2} = \frac{4}{2}

Simplify

cos (x) = 2

cos (x) = 2

- 1 \leq cos (x) \leq 1

No Solution for x \in R

sec (x) = 1 - tan (x)

2 sin (x) sin (3 x) = 1, 0 \leq x \leq 2 π

cos (x) + 3 sin (x) = 0

tan (x) = sec (x) - 1

cos^{2} (θ) + 9 cos (θ) + 18 = 0

What is the general solution for 2cos(x)-4=0 ?
The general solution for 2cos(x)-4=0 is No Solution for x\in\mathbb{R}