Monday
April 21, 2014

Homework Help: Trig

Posted by Kate on Monday, April 16, 2007 at 7:38pm.

Compute inverse functions to four significant digits.
cos^2x=3-5cosx

rewrite it as..

cos^2x + 5cosx -3=0

now you have a quadratic, solve for cos x using the equation

cosx=(-5 -+ sqrt (25 +12)/2

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