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### How to study your flashcards.

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### 40 Cards in this Set

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 30 degrees = ? Radians π/6 45 degrees = ? Radians π/4 60 degrees = ? Radians π/3 90 degrees = ? Radians π/2 120 degrees = ? Radians 2π/3 135 degrees = ? radians 3π/4 150 degrees = ? radians 5π/6 180 degrees = ? radians π sin(30) = ? 1/2 sin(45) = ? √2/2 sin(60) = ? √3/2 sin(90) = ? 1 cos(30) = ? √3/2 cos(45) = ? √2/2 cos(60) = ? 1/2 cos(90) = ? 0 tan(30) = ? √3/3 tan(45) = ? 1 tan(60) = ? √3 tan(90) = ? Undefined 1/sin(x) = csc(x) 1/cos(x) = sec(x) 1/tan(x) = cot(x) cos^2(x) - 1 = ? sin^2(x) sin^2(x) - 1 = ? cos^2(x) 1 + tan^2(x) = ? sec^2(x) sec^2(x) - 1 = ? tan^2(x) 1 + cot^2(x) = ? csc^2(x) csc^2(x) - 1 = ? cot^2(x) sin(x) / cos(x) = ? tan(x) cos(x) / sin(x) = ? cot(x) sin(x + y) = ? sin(x)cos(y) +sin(y)cos(x) sin(x - y) =? sin(x)cos(y) - sin(y)cos(x) cos(x + y) = ? cos(x)cos(y) - sin(x)sin(y) cos(x - y) = ? cos(x)cos(y) + sin(x)sin(y) tan(x + y) = ? (tan(x) + tan(y)) / (1 - tan(x)tan(y)) tan(x - y) (tan(x) - tan(y)) / (1 + tan(x)tan(y)) sin(2x) = ? 2sin(x)cos(x) cos(2x) = ? = ? = ? cos^2(x) -sin^2(x) 2cos^2(x) - 1 1-2sin^2(x) tan(2x) = ? (2 tan(x))/ (1-tan^2(x))