Find the exact value of the expression.sin 265° cos 25° - cos 265° sin 25°
A. - 
B. 
C. - 
D. - 
Answer: D
Mathematics
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Use rational exponents to simplify. Write the answer in radical notation if appropriate.
A. 
B. 
C. 
D. 
Mathematics
Solve the given trigonometric equation analytically (using identities when necessary for exact values when possible) for values of x for 0 ? x < 2?.2 cos 2x = 
A. No solution
B. 
, 
, 
, 
C. 0, 
, ?, 
D. 
, 
, 
, 
Mathematics
Evaluate.(-1)20
A. -1 B. 20 C. -20 D. 1
Mathematics
Solve the system of equations using matrices. Use Gauss-Jordan elimination.
A. {(2, 6, -1)} B. {(-1, 6, 2)} C. {(1, 5, 6)} D. {(1, 6, 5)}
Mathematics