Use the fundamental identities to simplify the expression.sin2? + tan2? + cos2?
A. cos3?
B. tan2?
C. sin ?
D. sec2?
Answer: D
Mathematics
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Perform the indicated operations.A current of 2.64 e-1.48j amperes flows in a given circuit. Express this current in polar form.
A. -1.48 (cos 2.64° + j sin 2.64° ) B. -1.48 (cos 151.3° + j sin 151.3° ) C. 2.64 (cos (-1.48°) + j sin (-1.48° )) D. 2.64 (cos (-84.8°) + j sin (-84.8° ))
Mathematics
Divide, when possible.
A. 1246 B. 1256 r20 C. 1251 r12 D. 1236
Mathematics
Add or subtract. Assume all variables represent positive real numbers.
+ 9
- 9
A. 38
B. 59
C. -38
D. -50
Mathematics
Determine whether the given value is a solution to the given equation.Is 4.2 a solution to x + 8.8 = 13?
A. Yes B. No
Mathematics