What is the general solution for -2cos(a)+6=cos(a)+9 ?

The general solution for -2cos(a)+6=cos(a)+9 is a=pi+2pin

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-2cos(a)+6=cos(a)+9

- 2 cos (a) + 6 = cos (a) + 9

a = π + 2 πn

Solution steps

- 2 cos (a) + 6 = cos (a) + 9

Solve by substitution

cos (a) = - 1

cos (a) = - 1 : a = π + 2 πn

Combine all the solutions

a = π + 2 πn

sin (θ) = 0.64

tan (θ) = \frac{6}{5}

sin (2 x) = 2 cos (x), 0 \leq x \leq 2 π

y, x = arccos (y)

tan (x) = \frac{- 1}{1}

What is the general solution for -2cos(a)+6=cos(a)+9 ?
The general solution for -2cos(a)+6=cos(a)+9 is a=pi+2pin