The two triangles below are similar. Find the missing length or lengths.
A. 45
B. 34
C. 36
D. 28
Answer: C
Mathematics
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Name the quadrant in which the angle ? lies.cos ? > 0, csc ? < 0
A. I B. II C. III D. IV
Mathematics
Identify the equation as either an identity or not.cos2x - sin2x = 1 - 2 sin2x
A. Identity B. Not an identity
Mathematics
Find the exact value of the trigonometric expression without the use of a calculator.sin 255° cos 15° - cos 255° sin 15°
A. - 
B. - 
C. - 
D. 
Mathematics
Perform the indicated matrix operations.Let A = 
and B = 
. Find 3A + 2B.
A. 
B. 
C. 
D. 
Mathematics