What is cos^-1(cos (7 π)/6)?

Inverse Trigonometric Functions · Question 111 of 120

Question 111

HardOriginal question

What is $\cos^{-1}\left(\cos \frac{7 \pi}{6}\right)$ ?

- \frac{5 \pi}{6}

Correct answerYour answer

\frac{\pi}{6}

Correct answerYour answer

\frac{5 \pi}{6}

Correct answerYour answer

\frac{7 \pi}{6}

Correct answerYour answer

Show the answer and explanation

CorrectNot quiteAnswer C

Correct answer: C

Worth noting

$\frac{7\pi}{6}$ is more than $\pi$ , off the branch of $\cos^{-1}$ .

Ten questions from Inverse Trigonometric Functions, at your own pace.

Ten questions from Inverse Trigonometric Functions, at your own pace.