Write the trigonometric expression as an algebraic expression containing u and v.sin(tan-1 u - tan-1 v)
A. 
B. 
C. 
D. 
Answer: C
Mathematics
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Provide an appropriate response.Using the law of sines, find b if c = 157, B = 50°, and C = 70° in triangle ABC. Round to four significant digits.
A. 192.6 B. 219.8 C. 112.1 D. 128.0
Mathematics
Find the midpoint of the segment with the given endpoints.
and 
A. 
B. 
C. 
D. 
Mathematics
Complete the identity. 
= ?
A. 1 B. -1 C. cos2 x D. sin2 x
Mathematics
Write the number in scientific notation.6,900,000
A. 6.9 × 10-6 B. 6.9 × 106 C. 6.9 × 107 D. 6.9 × 10-7
Mathematics