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```
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

```
9 months ago

Arun
25768 Points
```							Dear student If cos²A = cos²Bthen we can not say A = B As if A + B = nπThenA = nπ- B Then always also cos²A = cos²B
```
9 months ago
Vikas TU
14149 Points
```							For a slightly different solution,2cos2A−2sin2B=2cos2A−1+1−2sin2B=cos2A+cos2B=2cos(A+B)cos(A−B)and halve each side.
```
9 months ago
Yashraj
391 Points
```							if you are thinking to take square root and just say cosa=cosbactually you forget to take mode after taking rootso there can be also one case a=-b
```
8 months ago
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### Course Features

• 31 Video Lectures
• Revision Notes
• Test paper with Video Solution
• Mind Map
• Study Planner
• NCERT Solutions
• Discussion Forum
• Previous Year Exam Questions