Question

Let $\Delta$ be the area of the region $\\{(x,y)∈R^2:x^2+y^2≤21,y^2≤4x,x≥1\\}$. Then $\frac{1}{2}(\Delta-21\text{ sin}^{-1} (\frac{2}{\sqrt7}))$ is equal to

• A. √3-4/3
• B. 2√3-1/3
• C. √3-2/3
• D. 2√3-2/3

Answer 1

Answer: (A)

√3-4/3

Answer 2

The correct answer is √3-4/3