I have difficulty on how to eliminate parameter especially the equation involved trigonometry equation.
The question is asking for the area bounded by the curve , the 2 axes and the line $y=1$.
$x=4 \sin t$
where $t$ is in the range $(0, \pi)$. I have tried to use the trigonometric formula $1+ \cot^2 t =\csc^2 t$
but I got the wrong answer.The answer given is 4ln[(square root 2)+1].