Answer:
Step-by-step explanation:
-the angles need to add to 90° because they have to e complementary
- the cofunctions come in pairs (sin and cos, tan and cot, sec and csc)
for sin 7°
we know that function sin is paired with cos , and that the angles needs to add to 90° so we have 7° + 83° =90°
sin 7° = cos 83°, cos 83° is a cofunction of sin 7°
