- Home
- AU Maths Methods
- Sine Rule and Cosine Rule
Applications of the sine law and cosine law
- Lesson: 121:31
- Lesson: 2a11:20
- Lesson: 2b5:29
Applications of the sine law and cosine law
What's the purpose of learning the Law of Sines and the Law of Cosines? To solve real-life problems! In this section on applications of the two laws, we will apply our trigonometry knowledge to tackle distance problems.
Related Concepts: Quotient identities and reciprocal identities, Pythagorean identities, Sum and difference identities
Lessons
- 1.Neo left home and drove to a grocery store on a bearing of N15°W. Then he drove to a mall located 11km away from the grocery store. If the mall is 13 km away on a bearing of N60°W from his home, what is the distance between Neo's home and the grocery store?
- 2.Owen sees a firework on a bearing of 290°. Meanwhile 6km due west of Owen, Macy sees the same firework on a bearing of 065°.a)How far is each person away from the firework?b)If Macy's parents are enjoying the firework 1.5 km due north of Macy, how far are Macy's parents from the firework?