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Match the LIST-I with LIST-II

LIST-I (Functions)LIST-II (Principal Values)
A.sin⁡−1(−12)+cos⁡−1(−12)\sin^{-1}\left(-\dfrac{1}{2}\right) + \cos^{-1}\left(-\dfrac{1}{2}\right)I.−π3-\dfrac{\pi}{3}
B.cos⁡−1(12)+2sin⁡−1(12)\cos^{-1}\left(\dfrac{1}{2}\right) + 2\sin^{-1}\left(\dfrac{1}{2}\right)II.3π4\dfrac{3\pi}{4}
C.tan⁡−13−sec⁡−1(−2)\tan^{-1}\sqrt{3} - \sec^{-1}(-2)III.π2\dfrac{\pi}{2}
D.cos⁡−1(−12)\cos^{-1}\left(-\dfrac{1}{\sqrt{2}}\right)IV.2π3\dfrac{2\pi}{3}

Choose the correct answer from the options given below:

Solution

✅ Correct Option: 1

A: −π6+2π3=π2-\frac{\pi}{6}+\frac{2\pi}{3}=\frac{\pi}{2} (III).

B: π3+2⋅π6=2π3\frac{\pi}{3}+2\cdot\frac{\pi}{6}=\frac{2\pi}{3} (IV).

C: π3−2π3=−π3\frac{\pi}{3}-\frac{2\pi}{3}=-\frac{\pi}{3} (I).

D: π−π4=3π4\pi-\frac{\pi}{4}=\frac{3\pi}{4} (II).

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