The diagram shows part of the curve with equation $$\[ y=4 \sin ^{2} x+8 \sin x+3, \]$$ where $$\(x\)$$ is measured in radians. The curve crosses the $$\(x\)$$-axis at the point $$\(A\)$$ and the shaded region is bounded by the curve and the lines $$\(x=0\)$$ and $$\(y=0\)$$. Find the exact $$\(x\)$$-coordinate of $$\(A\)$$. ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................

Answer:

Knowledge points:

Solution: