Answer:
Option A. b = 90° - a
Step-by-step explanation:
we know that
If two angles are complementary, the cofunction identities state that the sine of one equals the cosine of the other and vice versa
so
If
sin(a)=cos(b)
then
angle a and angle b are complementary
[tex]a+b=90^o[/tex]
isolate the angle b
[tex]b=90^o-a[/tex]
