Solve the following equation algebraically. Give a general solution.

3cos^{2}x+cosx=2

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- November 20th 2012, 04:16 PMvanessa81929Solving Trigonometric Equations
Solve the following equation algebraically. Give a general solution.

3cos^{2}x+cosx=2 - November 20th 2012, 04:20 PMPlatoRe: Solving Trigonometric Equations
- November 20th 2012, 04:21 PMskeeterRe: Solving Trigonometric Equations
- November 20th 2012, 04:26 PMvanessa81929Re: Solving Trigonometric Equations
cosx= 2/3 cosx= -1

what do you do next? - November 20th 2012, 04:34 PMskeeterRe: Solving Trigonometric Equations
- November 20th 2012, 04:43 PMvanessa81929Re: Solving Trigonometric Equations
For the first one, x= 0.841+2npi

And for the second one, x=pi+2npi

Where are you getting a third solution from? - November 20th 2012, 04:54 PMskeeterRe: Solving Trigonometric Equations
has two solutions, one in quad I and one in quad IV

for , the general solution should be written ...

... and put away the calculator.