Question

Please help me in question 8
It is a one mark

Answer 1

Answer:

use angle sum property of triangle

A+B+C=180

since angleC is 90°

A+B+90°=180°

A+B=90

now cosec(A+B)=cosec(90)= 1

hope this will help u

Answer 2

Answer:

Use angle sum property of triangle A+B+C=180 since angle C is 90 A+B+90 degree=180 degree A+B=90, now cosec (A+B)=cosec (90) that i.e =1