The rule for converting sin into cos and vice versa is:
sin α = cos ( 90° - α ) or cos α = sin ( 90° - α )
In this case:
cos ( 6 x ) = sin ( 90° - 6 x )
sin ( 90° - 6 x ) = sin ( 3 x - 9°)
90° - 6 x = 3 x - 9°
90° + 9° = 3 x + 6 x
99° = 9 x
x = 99° : 9 = 11°
Answer: C ) x = 11°
DONT CLICK ON THE LINKS! It’s 8.750 BY THE WAY the radius is half the diameter so just add the radius by itself or multiply by 2
Answer:
60 units^2
Step-by-step explanation:
In order to find the area of a triangle, you do baseXheight/2. However, we don't have the height. So, we use the pythagorean theorem to solve for the missing side.
8^2+x^2=17^2
64+x^2=289
x^2=225
x=15
So, now we can solve for the area.
15*8=120
And divide by 2 we get 60
Answer:
4/5 / 4/9 = 1 and 4/5 mph or B
Step-by-step explanation:
4/5 / 4/9
4/5 times 9/4 = 36/20
36/20 simplified = 9/5
9/5 = 1 and 4/5
