Find the exact value of the expression. Do not use a calculator.1 - sin2 30° - sin2 60°
A. 1
B. 
C. 
D. 0
Answer: D
Mathematics
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?Let 
. Define an operation 
as 
. Check the
commutative and associative properties. ? A. associative but not commutative B. neither C. associative and commutative D. commutative but not associative
Mathematics
Expand the expression using the Binomial Theorem.(x - 4)5
A. x5 - 20x4 + 160x3 - 640x2 + 1280x - 1024 B. x5 - 20x4 + 320x3 - 1280x2 + 1280x - 1024 C. x5 - 20x4 + 160x3 - 640x2 + 1280x - 4 D. x5 - 20x4 + 320x3 - 1280x2 + 1280x - 4
Mathematics
Sketch the straight line with the equation.
?
?
?
A. ?
B. ?
C. ?
D. ?
E. ?
Mathematics
Use the Gauss-Jordan method to solve the system of equations. 3x + y = 7 8x + 3y = 18
A. (-2, 3) B. (-2, -3) C. (3, -2) D. No solution
Mathematics