Find the exact value of the inverse sine, cosine, and tangent of √3

, if possible.

sin^−1(√3)
=



π
π/2
π/4
π/3
−π/6
−π/3
The exact value cannot be determined.




cos^−1(√3)
=

π/6
π/4
−π/6
π
π/3
−π/2
The exact value cannot be determined.




tan^−1(√3)
=

−π
−π/2
−π/3
π/3
π/6
π/4
The exact value cannot be determined.

1 answer

To find the exact values of the inverse sine, cosine, and tangent of \( \sqrt{3} \), let's evaluate each function separately.

  1. Finding \( \sin^{-1}(\sqrt{3}) \): The range of the \( \sin^{-1}(x) \) function is \([- \frac{\pi}{2}, \frac{\pi}{2}]\) and the sine function only takes values in the range \([-1, 1]\). Since \( \sqrt{3} \) is approximately \( 1.732 \) (which is greater than 1), it is not a valid input for \( \sin^{-1} \). Therefore: \[ \sin^{-1}(\sqrt{3}) = \text{The exact value cannot be determined.} \]

  2. Finding \( \cos^{-1}(\sqrt{3}) \): The range of the \( \cos^{-1}(x) \) function is \([0, \pi]\) and the cosine function takes values from \([-1, 1]\). Since \( \sqrt{3} \) is also greater than 1, it is not a valid input for \( \cos^{-1} \). Therefore: \[ \cos^{-1}(\sqrt{3}) = \text{The exact value cannot be determined.} \]

  3. Finding \( \tan^{-1}(\sqrt{3}) \): The range of the \( \tan^{-1}(x) \) function is \((- \frac{\pi}{2}, \frac{\pi}{2})\), and it can take any real number as input. The tangent of \( \frac{\pi}{3} \) equals \( \sqrt{3} \). Thus: \[ \tan^{-1}(\sqrt{3}) = \frac{\pi}{3}. \]

In summary, the results are:

  1. \( \sin^{-1}(\sqrt{3}) = \text{The exact value cannot be determined.} \)
  2. \( \cos^{-1}(\sqrt{3}) = \text{The exact value cannot be determined.} \)
  3. \( \tan^{-1}(\sqrt{3}) = \frac{\pi}{3}. \)