Trigonometric Identities - Senior Precalculus
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Trigonometric Identities to memorize for Senior year precal
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7 Terms
1
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sin²(x) + cos²(x) = 1
Pythagorean Relationship #1
2
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1 + tan²(x) = sec²(x)
Pythagorean Relationship #2
3
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1 + cot²(x) = csc²(x)
Pythagorean Relationship #3
4
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(𝜋/2 - (x))
Cofunction Relationship Rule
5
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cos/sec
Positive Trig Even/Odd Relationships
6
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SCT (Sin, Csc, Tan)
Positive in 1 and 4, ranging from [-𝜋/2 to 𝜋/2]
7
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CSC (Cos, Sec, Cot)
Positive in 1 and 2, ranging from [𝜋 to 0]
Note 
Flashcards (22)