Question

3 cos -1 (4x)=2 pie

Answer 1

Hey Gelda,
\(\Large\bf \color{#008353}{\text{Welcome to OpenStudy! :)}}\)

Answer 2

\[\Large\rm 3\cos^{-1}\left(4x\right)=2\pi\]Divide by 3,\[\Large\rm \cos^{-1}(4x)=\frac{2\pi}{3}\]

Answer 3

Take the inverse of the expression, swapping the argument with the 2pi/3:\[\Large\rm \cos\left(\frac{2\pi}{3}\right)=4x\]

Answer 4

2pi/3 is one of your special angles, remember which value it gives you?

Answer 5

When you take the cosine of it*

Answer 6

What is 3 cos -1 (2x) =2 pie

Answer 7

What is 3 cos -1 (2x) =2 pie

Answer 8

What is the exact solution set of 3 cos -1 (4c) =2 pie