Find all y in [0,2π]

a.

How do I progress from here?

b.

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- April 12th 2013, 01:55 AMUnrealFind all y in [0,2π]
Find all y in [0,2π]

a.

How do I progress from here?

b.

- April 12th 2013, 02:55 AMibduttRe: Find all y in [0,2π]
- April 12th 2013, 02:59 AMibduttRe: Find all y in [0,2π]
Cos^2x + cos x = sin ^2 x

= 1 – cos^2 x

That gives

2 cos ^2 x + cos x -1 = 0

(Cos x + 1)( 2cosx – 1 )= 0

Cos x = -1 OR cos x = ½

Now you can proceed further - April 16th 2013, 12:33 AMmianasad1125Re: Find all y in [0,2π]
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