Complete the identity.(sin x - cos x)2 = ?
A. 1 + cos 2x
B. sin 2x
C. 1 - sin 2x
D. 1 - cos 2x
Answer: C
Mathematics
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Solve the problem. Express any improper fraction as a whole or mixed number.Martha can rake the leaves in her yard in 2 hours. Her brother can do the job in 6 hours. How long will it take them to do the job working together?
A. 
hr
B. 
hr
C. 1
hr
D. 3 hr
Mathematics
Solve by using the Superposition Theorem:
R1 = 4.7 Kê, R2 = 3.3 Kê, R3 = 5.1 Kê, E1 = 40 V, and E2 = 20 V.
Find the value of VR .
2
a. 0.488 V
b. 0.732 V
c. 0.363 V
d. 5.04 V
e. 11.44 V
Mathematics
Find 
in terms of 
.
Mathematics
Simplify the expression.
A. 1 B. 0 C. -x D. x
Mathematics