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### 26 Cards in this Set

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 cotangent ϴ (abbreviation) cot ϴ secant ϴ (abbreviation) sec ϴ cosecant ϴ (abbreviation) csc ϴ cot ϴ (full name) cotangent ϴ sin ϴ (reciprocal) 1 ──── csc ϴ cos ϴ (reciprocal) 1 ──── sec ϴ sec ϴ (full name) secant ϴ tan ϴ (reciprocal) 1 ──── cot ϴ csc ϴ (reciprocal) 1 ──── sin ϴ sec ϴ (reciprocal) 1 ──── cos ϴ csc ϴ (full name) cosecant ϴ cot ϴ (reciprocal) 1 ──── tan ϴ tan ϴ (ratio) sin ϴ ──── cos ϴ sin ϴ (definition) y ─ r cot ϴ (ratio) cos ϴ ──── sin ϴ cos ϴ (definition) x ─ r tan ϴ (definition) y ─ x cot ϴ (definition) x ─ y sec ϴ (definition) r ─ x csc ϴ (definition) r ─ y Pythagorean Identity? cos²ϴ + sin²ϴ = 1 What is: cos²ϴ + sin²ϴ = 1 The Pythagorean Identity. Simplify: (cos²ϴ + sin²ϴ)/cos²ϴ = 1/cos²ϴ 1 + tan²ϴ = sec²ϴ Simplify: (cos²ϴ + sin²ϴ)/sin²ϴ = 1/sin²ϴ cot²ϴ + 1 = csc²ϴ Express in terms of sin & cos: 1 + tan²ϴ = sec²ϴ (cos²ϴ + sin²ϴ)/cos²ϴ = 1/cos²ϴ Express in terms of sin & cos: cot²ϴ + 1 = csc²ϴ (cos²ϴ + sin²ϴ)/sin²ϴ = 1/sin²ϴ