(\cos\(\cos^{-1}x\)) किसके बराबर है जब \(x\in[-1,1]\)?
What is (\cos\(\cos^{-1}x\)) equal to when \(x\in[-1,1]\)?
Explanation opens after your attempt
A. \(\x\)
Concept
The expression \(\cos^{-1}x\) gives the angle whose cosine is (x). Hence (\cos\(\cos^{-1}x\)=x).
Why this answer is correct
The correct answer is A. \(\x\). The expression \(\cos^{-1}x\) gives the angle whose cosine is (x). Hence (\cos\(\cos^{-1}x\)=x).
Exam Tip
\(\cos^{-1}x\) वह कोण देता है जिसका कोसाइन (x) है। इसलिए (\cos\(\cos^{-1}x\)=x)।
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