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January 30, 2015

January 30, 2015

Posted by **Veronica** on Thursday, March 24, 2011 at 1:35pm.

- Trigonometry -
**Reiny**, Thursday, March 24, 2011 at 1:42pmsin^2 Ø = 1 - cos^ Ø

so replace that in the original to get

1 - cos^2Ø + cosØ - 2 = 0

cos^2Ø - cosØ + 1 = 0

It does not factor , so by the quadratic formula

cosØ = (1 ± √-3)/2

since the right side is a complex number there will be no solution for Ø

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