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Exam (elaborations)
SAT Math Section Study Guide
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sin-cos identity: sinx = cos(90-x) sin-cos identity: cosx = sin(90-x) 90º, pi/2 (0,1) 180º pi radians 30º, pi/6 (√3/2, 1/2) 45º, pi/4 (√2/2, √2/2) 60º, pi/3 (1/2, √3/2) 30, 60, 90 triangle x, x√3, 2x 45, 45, 90 triangle x, x, x√2 Circumference 2(pi)r or (pi)D tangent identity: tanx= sinx/cosx the distance from a data set's largest point to its smallest point range the measure of how spread-out the set's data points are standard deviation the middle term when a set is arranged least to greatest median the term in a set that shows up the most mode (sum of n numbers)/n= average/mean Common Right Triangle Proportions 3-4-5 5-12-13 8-15-17
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