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

The general solution for 2-2cos^2(x)=0 is x=2pin,x=pi+2pin

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2-2cos^2(x)=0

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

x = 2 πn, x = π + 2 πn

Solution steps

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

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

3 csc^{3} (x) - 4 csc (x) = 0

tan (θ) = \frac{6.06}{- 33.5}

csc (θ) = \frac{13}{2}, sec (θ) = \frac{13}{3}

4 cos^{2} (x) + cos (2 x) - 7 cos (x) = - 2, 0^{\circ} \leq x \leq 36 0^{\circ}

\frac{16}{sin ( a )} = \frac{12}{sin ( 3 1 ^{\circ} )}

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