Trigonometry 4 min read
Pointy vs Flat Triangles: What Makes Them Different
Pointy vs flat triangles: a flat triangle has one wide obtuse angle and a pointy one has one small angle, because every triangle's three angles share 180°.
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Trigonometry 9 min read
Reference Angles: How to Simplify Any Trig Problem
Reference angles: the acute angle to the x-axis that gives sin, cos and tan for any angle. Quadrant formulas, ASTC signs and examples like 315° and 5π/6.
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Trigonometry 7 min read
How to Find Missing Angles in a Right Triangle: 3 Easy Methods
How to find missing angles in a right triangle: subtract the known angle from 90°, or apply inverse sin, cos or tan to two sides. Legs 6 and 8 give 36.87°.
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Trigonometry 11 min read
Sine, Cosine & Tangent Explained: Visual Trigonometry Guide
Sine, cosine and tangent are ratios of a right triangle's sides (SOH-CAH-TOA). Diagrams, ladder and ramp examples, and how to pick the right one.
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