EduFarming
Your list · 0हिं

Type at least two letters. Press Esc to close.

↑↓ navigate↵ openTAB cycle filter

Inverse Trigonometric Functions · Question 38 of 120

Question 38

EasyOriginal question

If sin⁡−1x=−π3\sin^{-1} x = -\frac{\pi}{3}, what is xx?

Options for question 38

Show the answer and explanation
CorrectNot quiteAnswer A

Correct answer: A

Explanation

  1. x=sin⁡(−π3)x = \sin\left(-\frac{\pi}{3}\right), and −π3-\frac{\pi}{3} is on the branch.

  2. x=−32x = -\frac{\sqrt{3}}{2}.

Worth noting

−12-\frac{1}{2} is sin⁡(−π6)\sin\left(-\frac{\pi}{6}\right).

Concept
Undoing a principal value
Typical time
60 s
Your time
—
The rule this testsPrincipal values
Practise this chapter →

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

Practise this chapter →

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