Verify the identity.
- 
= - cos ? cot ?
What will be an ideal response?
- 
= 
+ 1 - 1 - 
= 
? cos ? - 
? 
= 
= 
= - 
= - cos ? ? 
= - cos ? cot ?
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Solve.2(2z - 5) = 3(z + 2)
A. -2 B. 16 C. 4 D. -4
Find the volume of the indicated region.the region under the surface 
, and bounded by the planes 
and 
and the cylinder 
A. 
B. 
C. 
D. 
An airplane takes off from an airport at a bearing along , of N 13°E, and a second plane leaves the same airport at bearing N 30° W along . A third plane leaves the airport at S 87° W along .What is the measure of the angle between the first and second planes? Between the first and third planes? (Remember: The bearing of a line segment is the acute angle that the line segment makes with a north-south line.)
What will be an ideal response?
Evaluate.Let a = 
i + 
j , b = 
i + 
j. Find a + b.
A. 
i - 
j
B. 
i + 
j
C. 
i + 
j
D. 
i + 
j