Friday

February 27, 2015

February 27, 2015

Posted by **Katie** on Wednesday, February 25, 2009 at 7:12pm.

Solve for all values of x if 0¡Âx¡Â2¥ð.

cos©÷(4x)+cos(4x)=0

The answer I have is:

x=¥ð/8, 3¥ð/8, 5¥ð/8, 7¥ð/8, 9¥ð/8, 11¥ð/8, 13¥ð/8, ¥ð/4,3¥ð/4, 5¥ð/4, 7¥ð/4

- Math -
**Katie**, Wednesday, February 25, 2009 at 7:23pmSorry, it seems cutting from Word and pasting here doesn't work. again teh problem is.

Solve for all values of c if 0 is less than or equal to x, which is less than or equal to 2pie.

(cosine squared of 4x) + (cosine of 4x)=0

the answer is

x= pie/8, 3pie/8, 5pie/8, 7pie/8, 9pie/8, 11pie/8, 13pie/8, 15pie/8, pie/4, 3pie/4, 5pie/4, 7pie/4

**Answer this Question**

**Related Questions**

Math - Solve this equation algebraically: (1-sin x)/cos x = cos x/(1+sin x) --- ...

trig question - Compute inverse functions to four significant digits. cos^2x=3-...

Trig/Precalc - So I have two questions that have been puzzling me for quite some...

Math/Calculus - Please check my work and correct any errors/point out any errors...

Calculus - MathMate Please help - ok, i tried to do what you told me but i cant ...

Alg 2/trig - I have the answers to the question, but I have no on how to get the...

math - how to define arc cosine(cosine x) for -360 deg<x< 360 deg?? a ...

calculus - find max, min and saddle points of the give function f(x,y)=sin(x)+...

Advanced Math - Solve 4sin^2 x + 4sqrt(2) cos x-6 = 0 for all real values of x. ...

Trigonometry - Okay, I have been given a trigonometric equation to solve (sin^2(...