Question
$ \sin^{-1}\text{x}+\cos^{1}\text{x}= $
- $ \frac{π}{2}$
- π
- π3
- 2π
✓
Answer
- $ \frac{π}{2}$
solution:
$ \sin-1\text{x}+\cos-1\text{x}=π2; \text{x} ∈ [-1,1] $
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