Monday

April 21, 2014

April 21, 2014

Posted by **makaela** on Wednesday, May 16, 2012 at 9:35pm.

- trig -
**Reiny**, Wednesday, May 16, 2012 at 10:36pminverse cos 4/5

= cos^-1 (4/5)

= .6435..

then tan^-1 x = .6435...

x = tan .6435...

= .75

or, make a diagram with sides 3-4-5

then, if tan^-1 x = cos^-1 (4/5)

then x = tan (cos^-1(4/5) )

= 3/4 or .75

**Related Questions**

trig - Tan(cos inverse 5x)

trig - How do you find the exact value of an inverse function geometrically. ie...

evaluation - Evaluate 1. sin(tan inverse sqrt(x^2-2x)) 2. tan (sec inverse 3y)

trig - inverse cos (-rad2/2)=135 degrees inverse sin (-rad2/2)=-45 degrees I ...

trig - use an inverse trig function to write è as a function of x (There is a ...

Math - Determine whether each equation is true for all x for which both sides of...

Trig. - sec^2xcotx-cotx=tanx (1/cos)^2 times (1/tan)-(1/tan)=tan (1/cos^2) times...

Calculus - Does f(x)= 1 + cos(x), have an inverse or not, if so, what is the ...

Evaluation-repost - Reposting because it has gone down to the second page! ...

trig - How do you solve cos(2arcsin 1/4) using inverse trig. functions??!! ...