Decide whether the expression is or is not an identity.tan (A + ?) = tan A
A. Identity
B. Not an identity
Answer: A
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Evaluate to four decimal places using a calculator.e2.887
A. 17.9394 B. 7.3891 C. 8.3348 D. 7.8477
Find the exact value under the given conditions.Given sin ? = - 
, with ? in quadrant IV, and tan ? = - 
, with ? in quadrant II. Find cos (? + ?).
A. - 
B. 
C. 
D. - 
Solve the problem.What is the probability of spinning an A on this spinner?
A. 
B. 
C. 
D. 
After the economy softened, the sky-high office space rents of the late 1990s started to come down to earth. The function 
gives the approximate price per square foot in dollars, 
, of prime space in Boston's Back Bay and Financial District from 1997 (
src="https://sciemce.com/media/3/ppg__cognero__4.4_Optimization_I__media__22c513d7-a1e5-43f4-9d7c-6c5f9da6a323.PNG" style="vertical-align:middle;" />) through 2000, where
? 
.
?What was the highest office space rent during the period in question?Hint: Use the quadratic formula.
?
A. $54.40 per sq ft
B. $54.47 per sq ft
C. $54.19 per sq ft
D. $54.26 per sq ft
E. $54.33 per sq ft