Trigonometry Tricks

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Trigonometry Trick – COS

Cos θ = √(fingers below)/2

For 0°, 30°, 45°, 60°, 90°:- √4/2, √3/2, √2/2, √1/2, √0/2 :- 1, √3/2, √2/2, 1/2, 0

Trigonometry Trick – SIN

Sin θ = √(fingers above) / 2

For 0°, 30°, 45°, 60°, 90° : √0/2, √1/2, √2/2, √3/2, √4/2 :- 0, 1/2, √2/2, √3/2, 1

Trigonometry Trick – TAN

Tan θ = Sin θ / Cos θ

For 0°, 30°, 45°, 60°, 90° :- 0, 1/√3, 1, √3, Not Defined :- 0, 1/√3, 1, √3, ∞

Trigonometry Trick – COT

Cot θ = Cos θ / Sin θ

For 0°, 30°, 45°, 60°, 90° :- Not Defined, √3, 1, 1/√3, 0 :- ∞, √3, 1, 1/√3, 0

Trigonometry Trick – SEC

Sec θ = 1 / Cos θ

For 0°, 30°, 45°, 60°, 90° :- 1, 2/√3, √2, 2, Not Defined :- 1, 2/√3, √2, 2, ∞

Trigonometry Trick – COSEC

Cosec θ = 1 / Sin θ

For 0°, 30°, 45°, 60°, 90° :- Not Defined, 2, √2, 2/√3, 1 :- ∞, 2, √2, 2/√3, 1