0

ADNAN MUHAMMED

Grade 12,

Courses New

If cos^2( A) = cos ^2 (B) can we say angle A = angle B

If cos^2( A) = cos ^2 (B) can we say angle A = angle B

Grade:12

3 Answers

Arun
25750 Points
3 years ago
Dear student
 
If cos²A = cos²B
then we can not say A = B
 
As if A + B = nπ
Then
A = nπ- B
 
Then always also cos²A = cos²B
Vikas TU
14149 Points
3 years ago
For a slightly different solution,
2cos2A−2sin2B
=2cos2A−1+1−2sin2B
=cos2A+cos2B
=2cos(A+B)cos(A−B)
and halve each side.
Yashraj
908 Points
3 years ago
if you are thinking to take square root and just say cosa=cosb
actually you forget to take mode after taking root
so there can be also one case 
a=-b

Think You Can Provide A Better Answer ?

Other Related Questions on Trigonometry

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