Thursday
October 23, 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

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

trig question - Compute inverse functions to four significant digits. cos^2x=3-...
trig - it says solve for all real solutions, compute inverse functions to 4 ...
trig--power reducing formulas - Having trouble with this problem: Rewrite the ...
Math - Solving for Trig Equations - Solve the following equation for 0 less than...
Trig--check answer - Solve the equation of the interval (0, 2pi) cosx=sinx I ...
Trigonometry - Write equivalent equations in the form of inverse functions for a...
Trig - prove the identity (sinX)^6 +(cosX)^6= 1 - 3(sinX)^2 (cosX)^2 sinX^6= ...
Trigonometry - How do I solve these? 1) 2sinxcosx-cosx=0 2) cos^2(x)-0.5cosx=0 3...
TRIG! - Posted by hayden on Monday, February 23, 2009 at 4:05pm. sin^6 x + cos^6...
another precal - i have two questions for you to check please! 6cos^2x+5cosx-4=0...

Search
Members