0

Guest

Courses New

Cos-1(12/13)+2cos-1(√64/√65)+cos-1(√49/√50)=cos-1(1/√2)

Cos-1(12/13)+2cos-1(√64/√65)+cos-1(√49/√50)=cos-1(1/√2)

Grade:12

1 Answers

Vikas TU
14149 Points
4 years ago
Dear stuedent 
Cos-1(12/13) = tan-1 (5/12)
cos-1(√64/√65) = tan-1 (1/8) 
cos-1(√49/√50) = tan-1 (1/7)
Now use tan-1 (a) + tan-1(b) formula and find a tan-1(c) 
Now again find tan-1(c) + tan-1(d) and equate 
LHS = RHS 
Hope this helps 
Good luck 
 
 

Think You Can Provide A Better Answer ?

Other Related Questions on Discuss with Askiitians Tutors

View all Questions »

ASK QUESTION

Get your questions answered by the expert for free

Answer and earn gift vouchers

Win Gift vouchers upto Rs 500/-

View courses by askIITians

Design classes One-on-One in your own way with Top IITians/Medical Professionals

Click Here Know More

Complete Self Study Package designed by Industry Leading Experts

Click Here Know More

Live 1-1 coding classes to unleash the Creator in your Child

Click Here Know More

a Complete All-in-One Study package Fully Loaded inside a Tablet!

Click Here Know More