Question

Cos-1 (½) + 2sin-1 (½)

Answer 1

Answer:

add them to get correct answer

Answer 2

Answer:

Step-by-step explanation:

$cos^{-1}(\dfrac{1}{2} )+2sin^{-1}(\dfrac{1}{2} )\\\\\\=cos^{-1}(cos(\dfrac{\pi}{3} ))+2sin^{-1}(sin(\dfrac{\pi}{6} ))\\\\\\=\dfrac{\pi}{3} +2(\dfrac{\pi}{6} );$

[∴ π/3 ∈ [0,π] and π/6 ∈ [-π/2,π/2] ]

$=\dfrac{\pi}{3} +\dfrac{\pi}{3}\\\\\\\\=\dfrac{2\pi}{3}$