Hello, again, Everyone.

I have the following problem

My attempt:

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- Feb 20th 2013, 10:17 AMvaironxxrdSolving Trigonometric Equation
Hello, again, Everyone.

I have the following problem

My attempt:

- Feb 20th 2013, 10:43 AMveileenRe: Solving Trigonometric Equation
Hello! ^^

1. ,

2. ,

Those solutions are for . If , then the solutions are . - Feb 20th 2013, 10:47 AMMINOANMANRe: Solving Trigonometric Equation
Vaironxxrd

transfer the 2 to the left side and then substitute -2 with the basic trigonometric identity (cosx)^2+(sinx)^2=1 to find 2(cosx)^2+cosx=0

then factorise to get cosx[2cosx+1]=0..then solve it it is easy..try....it

MINOAS