if cotx= -2/3 and pi/2<x<pi

solve for tan(x/2)

Thanks

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- Jun 18th 2008, 06:36 PMandymacTrig identities!!!!!!!!!
if cotx= -2/3 and pi/2<x<pi

solve for tan(x/2)

Thanks - Jun 18th 2008, 07:08 PMTKHunny
- Jun 18th 2008, 09:48 PMSoroban
Hello, andymac!

Quote:

If

Since is in Quadrant 2,

. . Hence: .

Half-angle identity: .

Since is in Quadrant 2, is in Quadrant 1.

We have: .

Rationalize: .

Therefore: .