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TrigonometryIntroduction to Trigonometry
Complementary Angle Relations
Check sin(90° − θ) = cos θ and friends.
Controls
35 °
Live result
sin(90°−θ)
0.8192
cos θ
0.8192
tan(90°−θ)
1.4281
cot θ
1.4281
θ and its complement 90° − θsin(90°−θ): 0.8192
Ratios of complementary angles swap: sin ↔ cos, tan ↔ cot, sec ↔ cosec.