Verify the identity.
= cot ? - cot ?
What will be an ideal response?
= 
= 
- 
= 
- 
= cot ? - cot ?
Mathematics
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Solve.The population of Graham County is 839,777. The population of Broselow County is 261,217. The population of Irving County is 166,282. Find the difference in population between Graham County and Irving County.
A. 578,560 B. 673,495 C. 672,495 D. 578,660
Mathematics
Find the coordinates of the vertex of the parabola.y = 3x2 + 12x + 13
A. (2, -1) B. (-1, 2) C. (-2, 1) D. (1, -2)
Mathematics
Use the quadratic formula to solve the quadratic equation.x2 - 4x = 21
A. -7, 3 B. 7, -3 C. 7, 3 D. -7, 1
Mathematics
Solve the system of equations by graphing the equations on the same set of axes.
A. (4, -3) B. (-3, -4) C. (-3, 4) D. no solution
Mathematics