Identify the equation which has a solution equal to 2 π 3 \frac{2\pi}{3} 3 2 π .

x = cos ⁡ − 1 ( − 1 2 ) x=\cos^{-1}\left(-\frac12\right) x = cos − 1 ( − 2 1 )

x = cos ⁡ − 1 ( − 2 2 ) x=\cos^{-1}\left(-\frac{\sqrt2}{2}\right) x = cos − 1 ( − 2 2 <path d="M95,702 c-2.7,0,-7.17,-2.7,-13.5,-8c-5.8,-5.3,-9.5,-10,-9.5,-14 c0,-2,0.3,-3.3,1,-4c1.3,-2.7,23.83,-20.7,67.5,-54 c44.2,-33.3,65.8,-50.3,66.5,-51c1.3,-1.3,3,-2,5,-2c4.7,0,8.7,3.3,12,10 s173,378,173,378c0.7,0,35.3,-71,104,-213c68.7,-142,137.5,-285,206.5,-429 c69,-144,104.5,-217.7,106.5,-221 l0 -0 c5.3,-9.3,12,-14,20,-14 H400000v40H845.2724 s-225.272,467,-225.272,467s-235,486,-235,486c-2.7,4.7,-9,7,-19,7 c-6,0,-10,-1,-12,-3s-194,-422,-194,-422s-65,47,-65,47z M834 80h400000v40h-400000z"> )

x = tan ⁡ − 1 ( − 1 ) x=\tan^{-1}\left(-1\right) x = tan − 1 ( − 1 )

x = sin ⁡ − 1 ( 2 2 ) x=\sin^{-1}\left(\frac{\sqrt2}{2}\right) x = sin − 1 ( 2 2 <path d="M95,702 c-2.7,0,-7.17,-2.7,-13.5,-8c-5.8,-5.3,-9.5,-10,-9.5,-14 c0,-2,0.3,-3.3,1,-4c1.3,-2.7,23.83,-20.7,67.5,-54 c44.2,-33.3,65.8,-50.3,66.5,-51c1.3,-1.3,3,-2,5,-2c4.7,0,8.7,3.3,12,10 s173,378,173,378c0.7,0,35.3,-71,104,-213c68.7,-142,137.5,-285,206.5,-429 c69,-144,104.5,-217.7,106.5,-221 l0 -0 c5.3,-9.3,12,-14,20,-14 H400000v40H845.2724 s-225.272,467,-225.272,467s-235,486,-235,486c-2.7,4.7,-9,7,-19,7 c-6,0,-10,-1,-12,-3s-194,-422,-194,-422s-65,47,-65,47z M834 80h400000v40h-400000z"> )

11. Inverse Trigonometric Functions and Basic Trig Equations

11. Inverse Trigonometric Functions and Basic Trig Equations / Inverse Sine, Cosine, & Tangent / Problem 2

Problem 2

Identify the equation which has a solution equal to $\frac{2\pi}{3}$ .

$x=$\cos$^{-1}$\left$(-$\frac$12$\right$)$

$x=$\cos$^{-1}$\left$(-$\frac{\sqrt2}{2}\]\right$)$

$x=$\tan$^{-1}$\left$(-1$\right$)$

$x=$\sin$^{-1}$\left$($\frac{\sqrt2}{2}\]\right$)$

Identify the equation which has a solution equal to 2π3\(\frac{2\pi}{3}\)32π .

Identify the equation which has a solution equal to $\frac{2\pi}{3}$ .