What is the general solution for 2cos(x)+cos(x)+3=0 ?

The general solution for 2cos(x)+cos(x)+3=0 is x=pi+2pin

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2cos(x)+cos(x)+3=0

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

x = π + 2 πn

Solution steps

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

Simplify

2 cos (x) + cos (x) + 3 : 3 cos (x) + 3

3 cos (x) + 3 = 0

Move

3

to the right side

3 cos (x) = - 3

Divide both sides by

3

cos (x) = - 1

General solutions for

cos (x) = - 1

x = π + 2 πn

4 cosh (x) + 3 sinh (x) = 5

tan (θ) = 0.04

csc (θ) = \frac{9}{11}

5 - 7 sin (x) = 2 cos^{2} (x)

cos^{2} (x) - sin^{2} (x) = cos^{2} (x) + 3 cos (x)

What is the general solution for 2cos(x)+cos(x)+3=0 ?
The general solution for 2cos(x)+cos(x)+3=0 is x=pi+2pin