Answer:
A. <ECF and <BCF
Step-by-step explanation:
Complementary angles are angles that add up to give 90°
m<BCE = m<BCA = 90° (right angles)
m<ECF + m<BCF = m<BCA
m<ECF + m<BCF = 90° (Substitution)
Therefore, <ECF and <BCF are complementary angles.
So, the function is obviously shifted up by 1 so it rules out A and B, and we also see that the period is 4pi rather than 2pi, and using the fact that:

Now that we know our b value, we see that the correct answer would be C.
Answer:
15 degrees.
Step-by-step explanation:
- 5x + x + 90 = 180.
- 6x + 90 = 180.
- 6x = 90.
- x = 15.
These are all of the steps to completely get the correct answer to this question.
Hope this helps!!!
Kyle.
Answer:
THIS MAKES NO SENCE
Step-by-step explanation: