Go To Your Study Dashboard

Get Answers to all your Questions

header-bg

Evaluate the expression $\cos^{-1}(\cos 7)$
Option: 1
7

Option: 2
$2\pi-7$

Option: 3
$7-2\pi$

Option: 4
None of these

Answers (1)

best_answer

$\\\cos^{-1}(\cos 7)\neq 7\because \text{7 is not in the range of } [0,\pi]\\ But\,\,\cos^{-1}(\cos 7)=\cos^{-1}(\cos (2\pi-7))\\ =\cos^{-1}(\cos (7-2\pi))\\ =7-2\pi\\ \because 7-2\pi\text{ lies in the range of } [0,\pi]$

Posted by

avinash.dongre

View full answer

JEE Main high-scoring chapters and topics

Study 40% syllabus and score up to 100% marks in JEE

Similar Questions

0.1 M acetic acid solution having pH =3 is titrated against 0.05 M NaOH solution. Calculate pH at 1/4th stage of neutralization of acid.Option: 1

0.25×60+0.10x=0.15×(60+x)

Trending Articles/News

anam-khan

JEE Main 2026 answer key, response sheet out for 13 lakh at jeemain.nta.nic.in

anam-khan

JEE Main 2026 answer key, response sheet for session 1 exams today at jeemain.nta.nic.in; how to download

anam-khan

JEE Mains Answer Key 2026 (Out) LIVE: NTA releases response sheet for 13 lakh; how to download, cut-offs

Latest Question