Question

grade 10th it's urgent

Answer 1

Sec A = 15/7
Cos A = 1/SecA
Therefore CosA = 1/ 15/7
= 7/15 

A + B = 90 or
A = 90 - B 

CosA = Cos(90-B) 

7/15 = SinB 

CosecB = 1/SinB
= 1/ 7/15
= 15/7