1.A ladder leans up against a building at an angle of 65° with the ground. If the ladder is 5 metres long, how far up the building does it reach?

2.A student is overheard saying: "I don't need to learn the Primary Trig Ratios. I am just going to use the Sine and Cosine Laws to solve problems." Show by example that the student is right. Explain the advantages and disadvantages to this approach.