# Trig Midterm

 sin2x + cos2x = 1 A. Pythagorean Identity 1 + cot2x = csc2x a.Pythagorean Identity b.Double-Angle Identity d.c.Reciprocal Identity e.Half-Angle Identity f.The Sum and Difference Identity a.Pythagorean Identity 1 + tan2x = sec2x a.Pythagorean Identity b.Double-Angle Identity c.Reciprocal Identity d.Half-Angle Identity e.The Sum and Difference Identity a.Pythagorean Identity sin2x = 2sinx cosx E. Double-Angle Identity tan2x = (2tan x)/( 1- tan2x) A. Double-Angle Identity Ordered Pair If x and y are real numbers, then (x,y) is an ordered pair of real numbers. Linear equation in two variables 3x-7y=19 is the standard form Pythagorean Theorem in a right triangle the sum of the lengths of the legs in equal to the square of the length of the hypotenuse. a2+b2=c2 Pythagorean Theorem Distance Formula The distance d between the points (x,y) and (x2,y2) Midpoint Formula /frac{x1+x2}{2}, /frac{y1+y2}{2} The midpoint_______________. of the line segment with endpoints (x1,y1) and (x2,y2) The fixed distance is the ___________. Radius The given point is the ___________. Center The distance formula can be used to write and equation for a circurle with center______ and radius _____. (h,k)r(r>0). Authoraliciam369 ID199834 Card SetTrig Midterm DescriptionFormulas, definitions, examples Updated2013-02-12T00:45:43Z Show Answers