Question

plz give me solution line by line​

Answer 1

$\frac{1}{ { \sin(a) }^{2} }$

Answer 2

sec A = 1/cosA.

cosec A = 1/sin A.

cot A = cos A/sin A.

$= \frac{1}{sin \: a \: \times cos \: a \: } \times \frac{cos \: a}{sin \: a} \\ = \frac{1}{sin \: a } \times \frac{1}{sin \: a} \\ = \frac{1}{ {sin}^{2} a} \\ = {cosec}^{2} a.$

Mark it brainliest!!