Find an equation for the line tangent to the circle x^2 +y^2=25 at the point (3, -4)

If 90° < θ < 180° and cotθ = -1/3, then cscθ =

Astudent received the following grades last semester. find the student's semester grade point average. an a is algebra (3 credits), a b in history ( 3 credits), a in sociology ( 3 credits) a d in english ( 3credits) and a c in seminar ( 2credits). an a is worth 4 points, a b is worth 3 points a c is worth 2 points and a d is worth 1 point.

(hurry! ) which expression is equivalent to the following complex fraction?