trigonometric ratios
TRIGONOMETRIC RATIOS
Radian
Trigonometric ratios
Angles in a circumference
ratios in a circumference
Relationship between ratios of some angles
Ratios of operations with angles
Trigonometric equations
Exam
Vocabulary
Fun end
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Exam
Exam
1.- π/6 radians equals:
a) 30
o
b) 45
o
c) 60
o
d) 90
o
2.- sin (π/3) =
a) 1/2
b) √3/2
c) √2/2
d) √3/3
3.- 280
o
€....
a) I quadrant
b) II quadrant
c) III quadrant
d) IV quadrant
4.- If cosx = -1,2, then
a) x € II or III quadrant
b) x € I quadrant
c) sinx = -0,1
d) None of them
5.- sin(13π/3) =
a) 1/2
b) -1/2
c) √3/2
d) -√3/2
6.- cosec 720
o
=
a) 1
b) Doesn't exist
c) -1
d) 0
7.- tan(2π/3) =
a) -√3
b) √3
c) √3/3
d) -√3/3
8.- Decide which of these sentences is true:
a) sinx can be 2
b) cosecx can't be 2
c) tanx can be any Real Number
d) |cotanx|≤1
9.- If A, B and C are the angles of a triangle, then tanA + tg(B + C) =
a) 1
b) 0
c) -1
d) None of them
10.- The solutions of the equation: cos3x = sin 30
o
, are:
a) x € {60
o
+k360
o
, k€Ζ}, x € {120
o
+k360
o
, k€Ζ}
b) x € {60
o
+k120
o
, k€Ζ}, x € {60
o
+k120
o
, k€Ζ}
c) x € {20
o
+k360
o
, k€Ζ}
d) x € {20
o
+k120
o
, k€Ζ}
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