English

Find the Value of Cos − 1 ( Cos 13 π 6 )

Advertisements
Advertisements

Question

Find the value of \[\cos^{- 1} \left( \cos\frac{13\pi}{6} \right)\]

Advertisements

Solution

\[\cos^{- 1} \left( \cos\frac{13\pi}{6} \right) = \cos^{- 1} \left[ \cos\left( 2\pi + \frac{\pi}{6} \right) \right]\]
\[ = \cos^{- 1} \left[ \cos\left( \frac{\pi}{6} \right) \right]\]
\[ = \frac{\pi}{6}\]

shaalaa.com
  Is there an error in this question or solution?
Chapter 3: Inverse Trigonometric Functions - Exercise 4.15 [Page 119]

APPEARS IN

R.D. Sharma Mathematics Volume 1 and 2 [English] Class 12
Chapter 3 Inverse Trigonometric Functions
Exercise 4.15 | Q 59 | Page 119
Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×