Verify the identity.cos
= -sin ?
What will be an ideal response?
cos 
= cos 
cos ? + sin 
sin ? = 0 ? cos ? - 1 ? sin ? = - sin ?
Mathematics
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What percent of 32 is 28?
A. 114% B. 80% C. 87.5% D. 70%
Mathematics
Evaluate.-19 + (-10) + (-10) + 21
A. 60 B. 22 C. -18 D. 18
Mathematics
Write the whole number in expanded form.98,627
A. 70,000 + 2000 + 600 + 80 + 9 B. 9000 + 800 + 60 + 27 C. 98,627 D. 90,000 + 8000 + 600 + 20 + 7
Mathematics
Use the Gauss-Jordan method to solve the system of equations. 4x - y + 3z = 12 x + 4y + 6z = -32-3x + 3y + 9z = 20
A. (2, -7, -1) B. (-8, -7, 9) C. (8, -7, -2) D. No solution
Mathematics