Given cos alpha=15/17 in q1, find cos(alpha/2) and sin(alpha/2)

Which shows the correct substitution of the values a,b and c from the equation 1=-2x+3x^2+1

Biggest exam of the which of the following are polynomial functions?

Which statement is true about the extreme value of the given quadratic equation? a. the equation has a maximum value with a y-coordinate of -21. b. the equation has a maximum value with a y-coordinate of -27. c. the equation has a minimum value with a y-coordinate of -21. d. the equation has a minimum value with a y-coordinate of -27.