Download Algebra 2 and Trigonometry Regents Cheat Sheet and more Cheat Sheet Algebra in PDF only on Docsity! Algebra 2 & Trigonometry Regents Review Sheet Regents Date (Fill in): EQUAL Roots IMAGINARY Roots 2 UNEQUAL Roots Solving Linear/Quadratic Systems: 1.Set both equations to “y=” form. 2.Then set both equations equal to each other. 3.Solve the remaining quadratic equation for the x values. 4. Substitute x back in to find y values. 2 2 2 6 5 2 2 7 3 0 (2 1)( 3) 0 1 , 3 2 2.5, 5 x x x x x x x x x y y − + = + − + = − − = = = = = 22 6 5 2 y x x y x = − + − = Absolute Values Ex. Equations: Set up 2 cases: Positive case (copy over as is) Negative case: set = to negation of each term on the right Inequalities: Set up 2 cases: Positive case (copy over as is) Negative case: set = to negation of each term on the right Ex. 2 1 1 2 1 1 2 1 1 2 3 0 x x x x x x x x − = + − = + − = − − = = 2 1 1 2 1 1 2 1 1 2 3 0 0 2 x x x x x x x x x − < + − < + − > − − < > < < Less than: arrows in towards each other “AND” Greater than: arrows away from each other “OR” *CHECK all answers! Radical Equations 1. Isolate the radical 2. Square BOTH sides 3. Solve for x. OR Solve GRAPHICALLY! Left side into Y1, right side into Y2 Zoom Standard (#6) Wednesday June 18th, 11am Arc Length = Arc Length = Central angle (in Radians) r = radius S r S θ θ = g Cofunctions (sin-‐cos, sec-‐csc, tan-‐cot) Cofunctions of Complementary Angles are Equal Sin (x) = cos (90 – x) Ex. sec (2x + 10) = csc (x – 40) 2x + 10 + x – 40 = 90 3x – 30 = 90 3x = 120 X = 40 Trig Graphs Y = a sin (bx) + c A = amplitude (dist from midline to max) B = frequency (how many cycles occur 0 -‐ 2π) C = midline (average of max and min values) Period = 2π/Freq Freq = 2π/Per Setting up your axes: X-‐Axis: 4 tick marks spaced 3 boxes apart Y-‐Axis: 3 tick marks spaced 2 boxes apart π/2, π, 3π/2, 2π (same as 90, 180, 270, 360 deg) Show your work! List Amp, freq, period and midline for each graph. Label your graphs!!!