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Trig Ident, Spec Ang

Trig Identities, Special Angles and The Unit Circle

QuestionAnswer
sec x 1/cos x
csc x 1/sin x
cot x (there are 2 answers) 1/tan x, cos x / sin x
tan x sin x / cos x
sin²x + cos²x 1
1 + tan²x sec²x
1 + cot²x csc²x
cos(2x) (there are 3 answers) cos²x - sin²x, 1 - 2sin²x, 2cos²x - 1
sin(2x) 2sinxcosx
tan(2x) 2tanx / 1 - tan²x
sin 30 1/2
sin π/6 1/2
sin 60 √3/2
sin π/3 √3/2
sin 45 √2/2
sin π/4 √2/2
cos 30 √3/2
cos 60 1/2
cos 45 √2/2
cos π/6 √3/2
cos π/3 1/2
cos π/4 √2/2
tan 30 √3/3
tan π/6 √3/3
tan 60 √3
tan π/3 √3
tan 45 1
tan π/4 1
Created by: Ami1471
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