Answer:
15/2 sqrt(3) =z
15/4 sqrt(3) =y
Step-by-step explanation:
cos theta = adjacent side/ hypotenuse in a right triangle
cos 30 = z / 15
Multiply each side by 15
15 cos 30 = z
15 ( sqrt(3)/2)
sin theta = opposite side/ hypotenuse in a right triangle
sin 30 = y / z
Multiply each side by z
z sin 30 = y
z (1/2)=y
Z = 15/2 sqrt(3)
15/2 sqrt(3)*1/2
6/7 is the correct answr
Your answer is option c. The final simplified form should have y to the 4th power instead of y cubed. I think so..
7
bc