Friday

October 24, 2014

October 24, 2014

Posted by **richard** on Tuesday, May 4, 2010 at 9:53pm.

cos(Arccos(x)) = x

Give an example showing that Arccos(cos(x))= x need NOT be true for all x

- trig1 more question -
**Damon**, Tuesday, May 4, 2010 at 10:04pmif x = 300 degrees

cos x = 0.5

but

arccos(.5) = 60 degrees

**Answer this Question**

**Related Questions**

algebra 1 help please - 4) a student score is 83 and 91 on her first two quizzes...

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

Pre-Calculus-check answers - State the period and phase shift of the function y...

Trigonometry - 1. Find the exact value of the following (Think identity) Cos(2 ...

Math - Calculate the limit: lim(((arccos x)^(n+1))/((arccos x)^n) with x tends ...

Trig - On the same set of axes, sketch and label the graphs of the equations y...

Calculus - Book works out integral of sqtr(a^2-x^2)dx as a^2/2*arcsin(x/a)+x/2*...

Precalculus - PLEASE HELP!! Solve: 1. cos(arcsin(4/5))= ?? 2. tan(arccos(4/5...

Pre Calculus - sec x = -2 , π ≤ x ≤ 3π Use a calculator to...

Math (Trigonometry [Polar Form]) - Let z be a complex number such that z = 2(cos...