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trig review Flashcards | StudBud
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trig review
trig review
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Answers
1
π/10 radians equals how many degrees?
1.8 degrees
36 degrees
18 degrees
3.6 degrees
2
In a right triangle, cotangent is which ratio?
hypotenuse/adjacent
adjacent/opposite
opposite/adjacent
adjacent/hypotenuse
3
Given that sin 180°=0, sin
-1
(0)=180°
False
True
4
40 degrees equals how many radians?
π/9 radians
2π/3 radians
π/6 radians
2π/9 radians
5
Since cos π = -1, cos
-1
(-1) = π
False
True
6
sin
-1
(0)=
π
1
2π
0
7
tan
2
θ + 1 = csc
2
θ
False
True
8
In a 45-45-90 triangle,
The hypotenuse is √3 times as long as a leg
Each leg is twice as long as the hypotenuse
The hypotenuse is twice as long as a leg
The hypotenuse is √2 times as long as a leg
9
tan
-1
(45°)=1
False
True
10
"csc" is an abbreviation of what math term?
Cotangent
Coefficient
Cosine
Cosecant
11
In a 30-60-90 triangle, which is true?
The short leg is √3 times the length of the long leg
The short leg is twice as long as the hypotenuse
The short leg is half the length of the hypotenuse
The hypotenuse is √3 times the length of the short leg
12
tan (3π/4)=
-1
√2/2
-√2/2
1
13
"sin" is an abbreviation of what math term?
Sinusoidal
Sinus
Sine
Sinusitis
14
The equation of the unit circle is
y2+x2=1
(x-0)2-(y-0)2=1
x2-y2=1
(x-h)2+(y-k)2=r2
15
Which of the following is false?
cos2 x + sin2x = 1
csc x is positive in QIV
tan x = (sin x)/(cos x)
sin x is the reciprocal of csc x
16
cot (30°)=√3
True
False
17
In each quadrant of the unit circle, exactly two trig functions are positive
True
False
18
tan 270° =
-1
0
undefined
1
19
To convert from radians to degrees, multiply by the conversion factor (π radians/180°)
False
True
20
Secant is positive in Quadrant II
False
True
21
Which of the following is a solution to the equation sin x= ½?
-30 degrees
60 degrees
390 degrees
210 degrees
22
All six trig functions are positive in Quadrant IV
True
False
23
Which trig function is positive in Quadrant III?
Sine
Cotangent
Cosecant
Secant
24
The word "trigonometry" comes from the Greek words "trigonon" and "metron" which mean
triangle; and circle
tricky; and city
tricky; and circle
triangle; and measure
25
The Babylonians divided a circle into 360° because they rounded the number of days in a year to 360.
False
True
