Use identities to write each expression as a function of ?.cos (? + 270°)
A. -cos ?
B. sin ?
C. cos ?
D. -sin ?
Answer: B
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Provide an appropriate response.Derive the equations x = x0 + (v0 cos ?)t, y = y0 + (v0 sin ?)t - 
gt2by solving the following initial value problem for a vector r in the plane. Differential equation: 
= -gj Initial conditions: r(0) = x0i + y0j 
(0) = v0 cos ?)i + (v0 sin ?)j
What will be an ideal response?
Find div F.F(x, y, z) = ei + ln(2y + z)j + xyezk
A. e + 
+ xyez
B. 
+ ez
C. ei + ln(2y + z)j + xyezk
D. 
+ xyez
Classify the triangle as acute, right, or obtuse and as equilateral, isosceles, or scalene.
A. Acute, isosceles B. Obtuse, equilateral C. Acute, scalene D. Obtuse, scalene
Solve.On a map of Nature's Wonder Hiking Trails, 1 centimeter corresponds to 5 miles. Find the length of a trail represented by a line that is 2
centimeters long on the map.
A. 
mi
B. 12
mi
C. 127
mi
D. 2 mi