Question

which expression is always equivalent to sin x when 0 degrees < x < 90 degrees

Answer 1

Answer:

sin x =  cos (90 - x)   for    0 < x < 90 degrees.

Step-by-step explanation:

sin x when 0 degrees < x < 90 degrees

....

sin x =  cos (90 - x)   for    0 < x < 90 degrees.