Week 17 – precalculus 11

This week in precalculus 11 I learned about Sine Law.  I learned about trigonometry in grade 10 but this year we expand it a little bit more. Sine Law is to solve problems in triangles that are not right triangles. The formula for sine Law is:

Missing side: \frac{a}{sin A} = \frac{b}{sin B} = \frac{c}{sin C}


missing angle:\frac{sin A}{a} = \frac{sin B}{b} = \frac{sin C}{c}

Here is an example:


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