32 a b c dSolution1 pi pi4 4pi pi4 3pi4 236 2 pi6 pi2 p

3.2

a)

b)

c)

d)

Solution

1) pi -pi/4 = (4pi- pi)/4

= 3pi/4 = 2.36

2) pi/6 + pi/2

= (pi + 3pi)/6

= 4pi/6 = 2pi/3

= 2.094

3) -sinpi/3 = -sqrt3/2

4)   csc(5pi/6) = 1/sin5pi/6

=sin5pi/6 = sin(pi-pi/6)

= sinpi/6 = 1/2

csc(5pi/6) = 2