Which of the following is an identity?
a. csc^2 x + cot^2 x = 1
b. (cscx + cotx)^2 = 1
c. sec^2 x sec^2 x + 1 = tan^2 x csc^2 x
d. sin^2 x - cos^2 x = 1

65% of students in your school participate in at least one after school activity. if there are 980 students in you school, how many do not participate in an after school activity?

Solve the equation by completing the square. x^2+2x=17

]supplementary angles are two angles that add up to . • complementary angles are two angles that add up to degrees. • adjacent angles share a and a • congruent angles have the measure. • an triangle has one angle that is greater than 90 degrees. • a triangle with angles 45°, 45°, and 90° would be a triangle