For b and c your answers may involve squareroots Rationalize

For (b) and (c), your answers may involve squareroots. Rationalize denominators where appropriate. State the reference angle associated with 315degree. State the exact value of sin (315degre). State the exact value of tan (5pi/6).

Solution

a) reference ngle for 315⁰

=360-315

=45⁰

b)sin(315⁰)

=sin(360-315⁰)

=-sin(45⁰)

=-1/2

=-(2)/2

c) tan(5pi/6)

=tan(pi- pi/6)

=-tan (pi/6)

=-1/3

=-(3)/3