3.12: Trigonometric–exponential composite and inverse equation

0606/23/O/N/23 — Question 1 · 6 marks

The functions ff and gg are defined as follows, for all real values of xx.
f(x)=2sinx+3cosxf(x) = 2\mathrm{sin}\,x + 3\mathrm{cos}\,xg(x)=e3x1g(x) = \mathrm{e}^{3x} - 1
(a)
Find fg(0)fg(0).
[2]
(b)
Find gg(x)gg(x).
[1]
(c)
Solve the equation g1(x)=13ln5g^{-1}(x) = \dfrac{1}{3}\ln 5.
[3]