1. Lesson 4

1.3. Discover 3

Mathematics 20-2 M1 Lesson 4

Module 1: Trigonometry

 
Self-Check 1
 

Katrina has been asked to solve for angle θ in the following triangle. She says you can use either the sine law or the cosine law. Decide whether she is correct. Explain your answer.

 

This picture shows an acute triangle with a 7.5 cm side, an 8 cm side, and a 10 cm side. The angle across from the 8 cm side is 45 degrees, and the angle across from the 7.5 cm side is labelled theta.

 

Answer