Question

1.22. If 0 and b?
A. b = 90° - a
B. b = 90° + a
C. b = 180° – a
D. b = 180° + a

Answer 1

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

$a+b=90^o$

isolate the angle b

$b=90^o-a$

Answer 2

Answer:A.b=90*

Step-by-step explanation: