What is the general solution for cos^2(x)=5 ?

The general solution for cos^2(x)=5 is No Solution for x\in\mathbb{R}

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cos^2(x)=5

cos^{2} (x) = 5

No Solution for x \in R

Solution steps

cos^{2} (x) = 5

Solve by substitution

cos (x) = 5, cos (x) = - 5

cos (x) = 5 :

No Solution

cos (x) = - 5 :

No Solution

Combine all the solutions

No Solution for x \in R

sec^{2} (x) - 4 tan (x) = 0

3 sin (2 x) = 6 sin (x)

sin (x) = \frac{1}{3} \cdot cos (x)

2 sin^{2} (x) - 1 = cos (x), 0 \leq x \leq 2 π

x, cos (3 y) = tan (2 x)

What is the general solution for cos^2(x)=5 ?
The general solution for cos^2(x)=5 is No Solution for x\in\mathbb{R}