Complete the identity.sin (? + ?) cos (? - ?) = ?
A. sin ? cos ? - sin ? cos ? + sin ? cos ? + sin ? cos ?
B. sin2? - cos2?
C. sin2? cos2? - sin2? cos2 ?
D. sin ? cos ? + sin ? cos ?
Answer: D
Mathematics
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Solve the given trigonometric equation analytically (using identities when necessary for exact values when possible) for values of x for 0 ? x < 2?.sin2 x + sin x = 0
A. 0, ?, 
B. 0, ?, 
, 
C. 0, ?, 
, 
D. 0, ?, 
, 
Mathematics
Evaluate the expression by first changing the form. Verify the answer by use of a calculator. 
A. 
B. 
C. 2
D. 
Mathematics
Solve the problem.A rectangular patio has an area of 4m3 + 25m2 + 16m - 45. Find the length if the width is 4m + 9.
A. m2 - 4m + 5 B. m2 + 17m - 5 C. m2 + 4m - 5 D. m3 + 4m2 - 5m
Mathematics
Find values for b such that the triangle has no solutions. ? A = 24°, a = 5 ?
A. 
B. 
C. 
D. 
E. 
Mathematics