Direct, Inverse, Joint and Combined Variation.Coordinate System, Graphing Lines, Inequalities.Types of Numbers and Algebraic Properties.Introduction to Statistics and Probability.
Powers, Exponents, Radicals, Scientific Notation. Chemeketa Community College is an equal opportunity, affirmative action institution. u u u u u u u u u u u u − = − − = − = − − = − − = − = − Tutoring Services, Chemeketa Community College, 4000 Lancaster Dr. deg., 2.68 153.55rad rad π π × = → × ≈ Negative Angle Identites sin( ) sin, cos( ) cos, tan( ) tan, csc( ) csc, sec( ) sec, cot( ) cot. sin ,cos, tan ,csc ,sec ,coty x y r r x r r x y x y θ θ θ θ θ θ= Reciprocal Identities 1 1 1sin cos tan csc sec cot 1 1 1csc sec cot sin cos tan u u u u u u u u u u u u = Tangent and Cotangent Identities sin costan cot cos sin u uu u u u = Pythagorean Identities 2 2 2 2 2 2 sin cos 1, 1 tan sec, 1 cot csc u u u u u u + = + = + = Cofunction Identities sin cos, cos sin 2 2 csc sec, sec csc 2 2 tan cot, cot tan 2 2 u u u u u u u u u u u u π π π π π π − = − = − = − = − = − = Sum and Difference Formulas sin( ) sin cos cos sin cos( ) cos cos sin sin tan tantan( ) 1 tan tan u v u v u v u v u v u v u vu v u v ± = ± ± = ± ± = Double-Angle Formulas 2 2 2 2 2 2 tansin 2 2sin cos, tan 2 1 tan cos 2 cos sin 2cos 1 1 2sin uu u u u u u u u u u = − = − = − = − Power-Reducing Formulas 2 2 2 1 cos 2 1 cos 2sin, cos 2 2 1 cos 2tan 1 cos 2 u uu u uu u − + = − = + Half-angle Formulas 1 cos 1 cossin, cos 2 2 2 2 1 cos sin 1 costan 2 1 cos 1 cos sin u u u u u u u u u u u − + = ± = ± − − = ± = + + Arc Length s rθ= Law of Sines sin sinA B SinC a b c = Law of Cosines 2 2 2 2 cosc a b ab C= + − DeMoivre’s Theorem (cos sin )n nZ r n i nθ θ= + Parabola: 2 24, 4x ay y ax= Ellipse: 2 2 2 2 1 x y a b + = Hyperbola: 2 2 2 2 1 x y a b − = Deg. Cheat Sheet Definition of the Six Trigonometric Functions: Right triangle definitions, where 0 2 πθ. 
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