Solutions To Exercises Functions Worksheet Page 5
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13Solutions to Exercises
30
Exercise 1(e) Determine the values of the trigonometric functions at the angles:
with radian measure 2π/3.
2π
π
Solution: Since
= π −
, the coordinates of the point P determined by the angle
3
3
√
2π
−1
3
rad are
,
. The table below list the desired values.
3
2
2
t
P
sin cos
tan
cot sec csc
√
√
√
−1
3
3
−1
−1
2 √
2π/3
,
−
3
−2
√
2
2
2
2
3
3
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