Mathematics - Trigonometry - Advanced - Law of sines and cosines - Laws for Non-Right Triangles

7 steps: (1) SOH-CAH-TOA only works for RIGHT triangles. For ANY triangle, we need new tools. (2) LAW OF SINES: a/sinA = b/sinB = c/sinC. Use when: AAS, ASA, or SSA (ambiguous case). (3) Example: A=40°, B=70°, a=10. Find b: 10/sin40°=b/sin70° → b=14.62. (4) LAW OF COSINES: c²=a²+b²-2ab·cosC. Use whe

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Mathematics - Trigonometry - Advanced - Law of sines and cosines - Laws for Non-Right Triangles
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Mathematics - Trigonometry - Advanced - Law of sines and cosines - Laws for Non-Right Triangles

vivmagarwal
vivmagarwalJan 29, 2026

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7 steps: (1) SOH-CAH-TOA only works for RIGHT triangles. For ANY triangle, we need new tools. (2) LAW OF SINES: a/sinA = b/sinB = c/sinC. Use when: AAS, ASA, or SSA (ambiguous case). (3) Example: A=40°, B=70°, a=10. Find b: 10/sin40°=b/sin70° → b=14.62. (4) LAW OF COSINES: c²=a²+b²-2ab·cosC. Use whe

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MathematicsTrigonometry - AdvancedClass 12, A Level, Grade 11, Class 12, DP Grade 12

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