Sine Rule and Cosine Rule

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Card 1 of 43.2.2

3.2.2

Question

When is sine rule typically used?

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Card 1concept

Question

When is sine rule typically used?

Answer

When you have AAS, ASA, or SSA triangle data.

💡 Hint

Match side-angle opposite pairs.

Card 2concept

Question

When is cosine rule typically used?

Answer

When you have SAS or SSS triangle data.

💡 Hint

Great for finding unknown side first.

Card 3formula

Question

Cosine rule for side a?

Answer

a^2 = b^2 + c^2 - 2bc cos A

💡 Hint

Angle A is opposite side a.

Card 4concept

Question

Ambiguous case in sine rule means?

Answer

SSA data can produce two possible triangles.

💡 Hint

Check if 0, 1, or 2 triangles fit.

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Full study notes for Sine Rule and Cosine Rule

Topic 3.2 hub

2D and 3D trigonometry