Exercise (11.3) No(4, 5) - Solution
4. If $ \displaystyle α + β + γ = 180°$, prove that $ \displaystyle \text{(a)}\ \ \sin (\alpha +\be…
4. If $ \displaystyle α + β + γ = 180°$, prove that $ \displaystyle \text{(a)}\ \ \sin (\alpha +\be…
Solve the following equations for 0° ≤ x ≤ 360°. $ \displaystyle {(\text{a})\ 2\sin x\cos x=\sin x…
(b) Solution (1) $ \displaystyle \sin \text{135}{}^\circ =\sin (\text{180}{}^\circ -45{}^\circ )=\s…