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```
if Sin^-1x+sin^-1y=2π÷3. Then what is the value of cos^-1+cos^-1=?
if Sin^-1x+sin^-1y=2π÷3. Then what is the value ofcos^-1+cos^-1=?

```
2 years ago

Arun
25768 Points
```							Dear student cos^-1 (-1) + cos^- 1 (-1) = pi + pi = 2 * pi Hpe it helps RegardsArun (askIITians forum expert)
```
2 years ago
Susmita
425 Points
```							sin-1x+sin-1y=2pi/3or,(pi/2-cos-1x)+(pi/2-cos-1y)=2pi/3Or,cos-1x+cos-1y=pi-2pi/3=pi/3 Hope this helps.please approve if it does.
```
2 years 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