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- Question 2, Exercise 8.1
- to find the exact value of $\sin 75^{\circ}$ and then find $\tan 75^{\circ}$. ** Solution. ** Given $
- Question 3, Exercise 8.1
- == Find the exact value of $\sin 120^{\circ}$ and then $\tan 120^{\circ}$. ** Solution. ** \begin{alig
- Question 14, Exercise 8.1
- angle that the longer wire makes with the ground, then by Pythagoras theorem \begin{align*} & \overline{
- Question 1, Review Exercise
- a$</collapse> viii. If $\sin \beta=\frac{3}{5}$, then $\cos 2 \beta=\ldots$\\ * (a) $\frac{-7}{5}$\