pre­calc ch5 examA (answers).notebook
1.
December 06, 2016
Write the degrees, radians and points (x, y) 1. Write the degrees, radians and points(x, y) A
B
Degrees
C
D
radians points
A _________
_________
_________
B _________
_________
_________
C _________
_________
_________
D_________
_________
_________
E _________
_________
_________
E
2. Find all solutions in the interval [0, 2π)
2. Find all solutions in the interval [0, 2π)
cos2x ­ cosx = 0
cos2x ­ cosx = 0
1
pre­calc ch5 examA (answers).notebook
December 06, 2016
3. Find all solutions in the interval [0, 2π)
3. Find all solutions in the interval [0, 2π)
sin2x = ­√3
2
sin2x = ­√3
2
4. simplify:
4. simplify:
1 _ 1 secx + 1 secx ­ 1
1 _ 1 secx + 1 secx ­ 1
2
pre­calc ch5 examA (answers).notebook
December 06, 2016
5. Simplify completely. Show all work!
5. Simplify completely. Show all work!
secx ­ cosx tanx secx ­ cosx tanx a. sinx
a. sinx
b. cscx
b. cscx
c. 1 ­ cos2x
c. 1 ­ cos2x
d. sin2x
d. sin2x
e. none of the above
e. none of the above
A
6. If sinx = 5/13 and tany = ­4/3 and 0 < x < π/2 < y < π, find sin(x­y)
6. If sinx = 5/13 and tany = ­4/3 and 0 < x < π/2 < y < π, find sin(x­y)
3
pre­calc ch5 examA (answers).notebook
7. given cosu = ­2/7 and sinu > 0, find sin2u
December 06, 2016
7. given cosu = ­2/7 and sinu > 0, find sin2u
4