Evaluate.i48
A. -1
B. i
C. -i
D. 1
Answer: D
Mathematics
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Use the fundamental identities to find the value of the trigonometric function.Find sin ? if sec ? = - 
and tan ? < 0.
A. - 
B. 
C. - 
D. 
Mathematics
Find the perimeter or circumference. Use ? ? 3.14 when needed.
A. 38 yd B. 57 yd C. 56 yd D. 180.5 yd
Mathematics
In a submerged trial run of an attack submarine, a reading of the submarine's velocity was made every quarter hour, as shown in the accompanying table. Use the trapezoidal rule to estimate the distance traveled by the submarine during the 2-hour period. Please round the answer to the nearest hundredth if necessary.
Time, t (hr)0
Velocity, V(t) (mph)19.42333.839.437.235.127.826.23.8?
A. 52.89 mi
B. 54.15 mi
C. 58.52 mi
D. 45.47 mi
E. 47.87 mi
Mathematics
Solve.
- 
= 
A. 
B. 
C. - 
D. - 
Mathematics