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Loxivia
M6 Mental image: unit_circle +160 XP

Trigonometry

Sine, cosine and tangent on the unit circle.

Math lessons

Short guided journeys with the Clever Pizzaiolo.

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Formulas and rules

SOH CAH TOA sin = O/H ; cos = A/H ; tan = O/A Exact trigonometric values sin 30 = 1/2, cos 30 = sqrt3/2, tan 45 = 1 Pythagorean identity sin^2 x + cos^2 x = 1 Sine and cosine rules a/sin A = b/sin B ; c^2 = a^2 + b^2 - 2ab cos C

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