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TrigonometryIntroduction to Trigonometry
Identity Verifier
Verify sin²θ + cos²θ = 1 and its companions for any angle.
Controls
45 °
Live result
sin²θ + cos²θ
1
1 + tan²θ
2
sec²θ
2
1 + cot²θ = cosec²θ
2 = 2
Right triangle — ratios of the sidessin²θ + cos²θ: 1
These three Pythagorean identities are used in almost every trigonometry proof.