PRACTICE “EXAM 4”
This exam will cover 6.1-6.4 of the text, and material from each of the three previous exams
Math 1060-2, Fall 2007
•For the following problems, refer to the notation on the oblique triangle shown below...
C
A B
a
c
b
1. Solve for all the unknown sides and angles of the given triangles:
(a) A= 24◦,B= 55◦,b= 3
(b) A= 100◦,a= 125, c= 10
(c) A= 110◦,a= 5, b= 8
(d) B= 63◦,b= 14, c= 13
(e) a= 55, b= 25, c= 72
(f) A= 55◦,b= 3, c= 10
2. Find the area of the triangle having the indicated angle and sides: B= 130◦,a= 62, c= 20
3. If ~
u=h−2,3iand ~
v=h1,2i, perform the following operations, and sketch (and label) the resultant vectors.
(a) ~
u+~
v
(b) ~
u−~
v
(c) −2~
u
(d) 1
2~
v
(e) −~
u+ 3~
v
