I took the quiz and this what the answer, I hope this help future people that had the same question.
Answer:
Step-by-step explanation:
BD is opposite the 30° angle. The sine of 30° is 0.5. The sin of an angle in a right triangle is opposite/hypotenuse so BD = sin 30°x8.
Now you have two known lengths The third can be found by applying the Pythagorean theorem: BC²+BD²=CD², from which you can establish a numerical value for BC.
Answer:
Step-by-step explanation:
1. Shifting 
right or left, top or down, as the graph in the question has the same illustration of . Consider
2. find a and b by using two sample points from the graph: 
and 
Answer:
43° is correct answer
Step-by-step explanation:
Like me
Answer:
the first formula
Step-by-step explanation:
the graph is y=cosx and cosx=sin(x+90)
