Question

4. Evaluate sinA.sec(90-A)​

Answer 1

Step-by-step explanation:

sin A * sec (90 - A)

= sin A * 1 / cos (90 - A) ( sec A = 1 / cos A)

= sin A * 1 / sin A ( cos ( 90 - A) = sin A)

= 1

hope u understood

Answer 2

Answer:

sinA.(sec(90-A))

=sinA.cosecA

=1