In Chapter 7, we learned how to solve problems with right-angled triangles using SOH-CAH-TOA OPPOSITE ADJACENT HYPOTENUSE Now, in Chapter 8, we will learn how to solve problems with any kind of triangle using different laws. A BC a b c

For any triangle, we can use the Sine Law to find unknowns if we have an angle-length pair. 35 o BC 5 cm 6 cm c We have an angle-length pair here: 35 o and 5 cm, so we can use Sine Law to find the unknowns. 35 o B25 o b 6 cm c Here, we do not have an angle- length pair, so we cannot use Sine Law to find any unknowns.

A BC a b c a, b, c are side lengths A, B, C are angles We only use 2 terms in the equation at once. OR