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7 Cards in this Set
- Front
- Back
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Cosine rule |
X² = V² + Y² - 2(V)(Y)CosX |
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Sine rule |
A÷SinA = B÷ SinB = C÷ SinC |
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Area of triangle |
1÷2 ab SinC |
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Sine of an obtuse angle |
Sin x = Sin(180-x) |
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Cosine of an obtuse angle x |
Cos x= -Cos(180-x) |
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When to use cosine rule? |
2 sides + included angle but need to find 3rd angle 3 sides given and has to find an angle |
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When to use sine rule? |
Two angles and one side given Two sides and a non-included angle |
