IB Calculus Problem 012

Let \(f(x) = 6 + 6 \sin x\).

Part of the graph of \(f\) is given below.

The figure is not to scale.

image essential to understanding the question

The shaded region is bounded by the curve of \(f\), the x-axis, and the y-axis.

  1. Solve, for \(0 \leq x \leq 2\pi\)

    1. \begin{equation*} 6 + 6 \sin x = 6 \end{equation*}
    2. \begin{equation*} 6 + 6 \sin x = 0 \end{equation*}
  2. Write down the exact value of the x-intercept of \(f\), for \(0 \leq x \leq 2\pi\).

  3. The area of the shaded region is \(k\). Find the value of \(k\), giving your answer in terms of \(\pi\).

Let \(g(x) = 6 + 6 \sin (x - \frac{\pi}{2})\). The graph of \(f\) is transformed into that of \(g\).

  1. Give a full geometric description of this transformation.
  2. Given that \(\int_p^{p+\frac{3\pi}{2}}g(x)\,dx = k\) and \(0 \leq p < 2\pi\), find the two values of \(p\).
Published by Annie Bernatchez in «calculus». Key Words: IB, question