What is the general solution for 3=6cos(x) ?

The general solution for 3=6cos(x) is x= pi/3+2pin,x=(5pi)/3+2pin

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3=6cos(x)

3 = 6 cos (x)

x = \frac{π}{3} + 2 πn, x = \frac{5 π}{3} + 2 πn

Degrees

x = 6 0^{\circ} + 36 0^{\circ} n, x = 30 0^{\circ} + 36 0^{\circ} n

Solution steps

3 = 6 cos (x)

Switch sides

6 cos (x) = 3

Divide both sides by

6

6 cos (x) = 3

Divide both sides by

6

\frac{6 cos ( x )}{6} = \frac{3}{6}

Simplify

cos (x) = \frac{1}{2}

cos (x) = \frac{1}{2}

General solutions for

cos (x) = \frac{1}{2}

cos (x)

periodicity table with

2 πn

cycle:

x 0 \frac{π}{6} \frac{π}{4} \frac{π}{3} \frac{π}{2} \frac{2 π}{3} \frac{3 π}{4} \frac{5 π}{6} cos (x) 1 \frac{3}{2} \frac{2}{2} \frac{1}{2} 0 - \frac{1}{2} - \frac{2}{2} - \frac{3}{2} x π \frac{7 π}{6} \frac{5 π}{4} \frac{4 π}{3} \frac{3 π}{2} \frac{5 π}{3} \frac{7 π}{4} \frac{11 π}{6} cos (x) - 1 - \frac{3}{2} - \frac{2}{2} - \frac{1}{2} 0 \frac{1}{2} \frac{2}{2} \frac{3}{2}

x = \frac{π}{3} + 2 πn, x = \frac{5 π}{3} + 2 πn

x = \frac{π}{3} + 2 πn, x = \frac{5 π}{3} + 2 πn

2 cos (a) \cdot sin (2 a) - 1 + 2 sin (2 a) - cos (a) = 0

a, \frac{8 0 ^{2} sin ( 2 a )}{9.8} = 350

tan (A) = \frac{5}{12}, b = 3

tan (2 β) = - \frac{4}{3}

4 cos^{2} (x) - 5 cos (x) - 6 = 0

What is the general solution for 3=6cos(x) ?
The general solution for 3=6cos(x) is x= pi/3+2pin,x=(5pi)/3+2pin