Question

Question number 30 plz

Answer 1

$tanx = \frac{b}{a} \\ \frac{a}{b} = cotx = \frac{cosx}{sinx}$

Applying Componendo,

$\frac{a + b}{b} = \frac{cosx + sinx}{sinx} \\ a + b = \frac{b(cosx + sinx)}{sinx} > > (1)$

Applying dividendo,

$\frac{a - b}{b} = \frac{cosx - sinx}{sinx} \\ a - b = \frac{b(cosx - sinx)}{sinx} > > (2)$

Answer 2

Answer:

Please see the attachment