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Mathematics
Mathematics
Problem
Evaluate the following without using a calculator. a. (i) Convert
225
∘
225^\circ
22
5
∘
to radian measure. b. (ii) Find
cos
225
∘
\cos 225^\circ
cos
22
5
∘
and
sin
225
∘
\sin 225^\circ
sin
22
5
∘
. c. (iii) Hence calculate
tan
225
∘
\tan 225^\circ
tan
22
5
∘
. d. (iv) Find
cos
(
−
120
∘
)
\cos(-120^\circ)
cos
(
−
12
0
∘
)
,
sin
(
−
120
∘
)
\sin(-120^\circ)
sin
(
−
12
0
∘
)
and
tan
(
−
120
∘
)
\tan(-120^\circ)
tan
(
−
12
0
∘
)
. Provide each value in exact form.
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