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Name: Please solve RD Sharma class 12 chapter 3 Inverse Trigonometric Functions exercise Very short answer question 45 maths textbook solution
Uploaded: Fri, 2021-08-06 23:03
Description: Please solve RD Sharma class 12 chapter 3 Inverse Trigonometric Functions exercise Very short answer question 45 maths textbook solution

#School
#R.D. Sharma
#Inverse Trigonometric Functions
#RD Sharma Vol. 1 Class 12
#Maths
#CBSE 12 Class

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#Fill in the blanks
#Very Short Answer type
#Multiple Choice Questions (MCQs)
#18.1
#3.14
#3.13

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Please solve RD Sharma class 12 chapter 3 Inverse Trigonometric Functions exercise Very short answer question 45 maths textbook solution

Answers (1)

Answer: $40 \degree$

Given: $\cos ^{-1}\left(\cos 680^{\circ}\right)$

Hint: Try to solve $\cos 680^{\circ}$ first, then separate and solve.

Solution:

$\begin{aligned} \cos ^{-1}\left(\cos 680^{\circ}\right) &=\cos ^{-1}\left[\cos \left(720^{\circ}-680^{\circ}\right)\right] \\ &=\cos ^{-1}\left(\cos 40^{\circ}\right) \\ &=40^{\circ} \end{aligned}$

Posted by

infoexpert22

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Please solve RD Sharma class 12 chapter 3 Inverse Trigonometric Functions exercise Very short answer question 45 maths textbook solution

Answers (1)

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