0606 P11 - Nov 2018 - Q11 - 9 marks
8490
(a) \(f(x)=3-\cos2x\), for \(0\leq x\leq\dfrac{\pi}{2}\).
(i) Write down the range of \(f\).
(ii) Find the exact value of \(f^{-1}(2.5)\).
(b) \(g(x)=3-x^2\), for \(x\in\mathbb R\). Find the exact solutions of \(g^2(x)=-6\).
Solutions locked. Please sign in with access to view them.