Friday

July 25, 2014

July 25, 2014

Posted by **-** on Friday, November 13, 2009 at 10:44pm.

cosx + 0.75 = 0

- advanced functions -
**Reiny**, Friday, November 13, 2009 at 11:25pmcosx = -.75

the cosine is negative in II and III

take inverse cosine of +.75, this will give you the reference angle

for angle in II, take pi - reference angle

for angle in III take pi + reference angle

**Related Questions**

Advanced Functions - Determine the solutions for: (cos x)/(1 + sinx) + (1 + sinx...

Advanced Functions - Determine all solutions in the interval x is all real ...

Pre-Cal - Approximate the equation's soultions in the interval (o, 2pi). If ...

Pre-Cal(Please help) - Approximate the equation's soultions in the interval (o...

Math - Approximate the equation's solutions in the interval (0,2pi). sin2x sinx...

calculus - Find all solutions to the equation in the interval [0,2pi) Cosx-cos2x

trig - Find all solutions of the equation 2sin^2x-cosx=1 in the interval [0,2pi...

Trigonometry - Find all solutions of the equation in the interval [0,2pi] ...

Math - Can I please get some help on these questions: 1. How many solutions does...

Trig - Find all solutions of the equation in the interval [0,2pi) . cos(theta)=0...