Answer:
Step-by-step explanation:
This is a fascinating question. It turns out to be true because of the relationship between a 30 degree angle and a 60 degree angle
The answer is that the product of sin30*sin60 = cos(30)*cos(60). This happens because sin(60) = cos(90-60) = cos(30)
Other angles will do the same thing sin36 * sin54 = cos(54)*cos(36)
Answer: 31
Step-by-step explanation: divide 558 by 18
Answer:neither, neither, perpendicular , neither
parallel
Step-by-step explanation:put each line in the form y=mx+b
if m=m they are parallel
if m times m = -1 they are perpendicular
if the m’s are unrelated than neither
Answer:
38.5ft²
Step-by-step explanation:
Triangle area formula = 
Triangle area = 
Triangle area = 0.5 * 11 * 7
Triangle area = 38.5ft²
