Test your understanding of the unit circle, reciprocal trig functions, and Pythagorean identities.
1. Find the exact value of $\sin(\\frac{5\\pi}{6})$. (2 marks)
2. If $\sin\\theta = \\frac{3}{5}$ and $\\frac{\\pi}{2} < \\theta < \\pi$, find $\sec\\theta$. (2 marks)
3. Simplify $\\dfrac{1}{1-\\sin^2\\theta}$. (1 mark)
4. Find the exact value of $\sin(75°)$. (3 marks)