Pre-Calc Exam Notes 49

Pre-Calc Exam Notes 49 - The Law of Cosines Section 2.2 49...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
The Law of Cosines Section 2.2 49 Exercises For Exercises 1-6, solve the triangle ABC . 1. A = 60 , b = 8, c = 12 2. A = 30 , b = 4, c = 6 3. a = 7, B = 60 , c = 9 4. a = 7, b = 3, c = 9 5. a = 6, b = 4, c = 1 6. a = 11, b = 13, c = 16 7. The diagonals of a parallelogram intersect at a 42 angle and have lengths of 12 and 7 cm. Find the lengths of the sides of the parallelogram. ( Hint: The diagonals bisect each other. ) 8. Two trains leave the same train station at the same time, moving along straight tracks that form a 35 angle. If one train travels at an average speed of 100 mi/hr and the other at an average speed of 90 mi/hr, how far apart are the trains after half an hour? 9. Three circles with radii of 4, 5, and 6 cm, respectively, are tangent to each other externally. Find the angles of the triangle whose vertices are the centers of the circles. 10. Find the length x of the diagonal of the quadrilateral in Figure 2.2.3 below. 2
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.
Ask a homework question - tutors are online