Determining Trigonometric Functions
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4Regents Exam Questions
Name: ________________________
A2.A.56: Determining Trigonometric Functions 4
A2.A.56: Determining Trigonometric Functions 4: Know the exact and approximate values of the
sine, cosine, and tangent of 0º, 30º, 45º, 60º, 90º, 180º, and 270º angles
1 In the unit circle shown in the accompanying diagram, what are the coordinates of (x, y) ?
3
1)
, −0.5
3)
(−30, −210)
−
2
3
2
2
2)
4)
, −
−0.5, −
−
2
2
2
2 In the accompanying diagram of circle O, COA is a diameter, O is the origin, OA = 1 , and m∠BOA = 30 . What are
the coordinates of B?
3
2
2
1
1)
,
3)
,
2
2
2
2
3
2
1
1
2)
,
4)
,
2
2
2
2
1
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