2cos^2(15)-1=

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Solution for 2cos^2(15)-1= equation:


Simplifying
2cos2(15) + -1 = 0

Reorder the terms for easier multiplication:
2 * 15cos2 + -1 = 0

Multiply 2 * 15
30cos2 + -1 = 0

Reorder the terms:
-1 + 30cos2 = 0

Solving
-1 + 30cos2 = 0

Solving for variable 'c'.

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

Add '1' to each side of the equation.
-1 + 1 + 30cos2 = 0 + 1

Combine like terms: -1 + 1 = 0
0 + 30cos2 = 0 + 1
30cos2 = 0 + 1

Combine like terms: 0 + 1 = 1
30cos2 = 1

Divide each side by '30os2'.
c = 0.03333333333o-1s-2

Simplifying
c = 0.03333333333o-1s-2

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