2cos(2a-60)+1=0

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Solution for 2cos(2a-60)+1=0 equation:


Simplifying
2cos(2a + -60) + 1 = 0

Reorder the terms:
2cos(-60 + 2a) + 1 = 0
(-60 * 2cos + 2a * 2cos) + 1 = 0

Reorder the terms:
(4acos + -120cos) + 1 = 0
(4acos + -120cos) + 1 = 0

Reorder the terms:
1 + 4acos + -120cos = 0

Solving
1 + 4acos + -120cos = 0

Solving for variable 'a'.

Move all terms containing a to the left, all other terms to the right.

Add '-1' to each side of the equation.
1 + 4acos + -1 + -120cos = 0 + -1

Reorder the terms:
1 + -1 + 4acos + -120cos = 0 + -1

Combine like terms: 1 + -1 = 0
0 + 4acos + -120cos = 0 + -1
4acos + -120cos = 0 + -1

Combine like terms: 0 + -1 = -1
4acos + -120cos = -1

Add '120cos' to each side of the equation.
4acos + -120cos + 120cos = -1 + 120cos

Combine like terms: -120cos + 120cos = 0
4acos + 0 = -1 + 120cos
4acos = -1 + 120cos

Divide each side by '4cos'.
a = -0.25c-1o-1s-1 + 30

Simplifying
a = -0.25c-1o-1s-1 + 30

Reorder the terms:
a = 30 + -0.25c-1o-1s-1

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