Question

solve
8(i) step by step​

Answer 1

Answer:

$\sin(90 - a) = \frac{1}{ cosec(42) }$

$\sin(90 - a) = \sin(42)$

on comparision

90 - A = 42

A =48

Answer 2

Answer:

$sin(90 - 3a) \times \cosec(42) = 1 \\ \sin(90 - 3a) = \frac{1}{cosec(42)} \\ sin \alpha = \frac{1}{cosec \alpha } \\ so \: \sin(90 - 3a) = sin(42) \\ 90 - 3a = 42 \\ 3a = 90 - 42 \\ 3a = 48 \\ a = 12$