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What's the cosine rule to find the length of a line?
a² = b² + c² - 2bc cos A
What the cosine rule to find an angle?
cosA = (b² + c² - a²) / 2bc
What is the Sine rule for length?
a / sinA = b / sinB = c / sinC
What is the sine rule for angles?
just swap length rule
sinA/ a = sinB / b = sinC / c
How would you find the area of a non-right angled triangle?
½bc sin A
What is the logarithm general rule?
aˣ = b ⇔ Log (𝑎) b = x
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