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Trig > Basics > Flashcards

Basics Flashcards

0
Q

What is the reference angle

A

Always between zero and 90°
Angle starts from X axis and origin into any quadrant

Example the reference angle for 170° is 10°

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1
Q

Find a positive and negative coterminal angle

A

Just add +/-360°

Or

+/- 2*pi

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2
Q

How do you convert degrees to radians

A

Just multiply by pi / 180

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3
Q

How do you convert from radians to degrees

A

Just multiply by 180 / pi

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4
Q

Right triangle ratio for sin

A

=O/H

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5
Q

Right triangle ratio for cos

A

=A/H

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6
Q

Right triangle ratio for tan

A

=O/A

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7
Q

Right triangle ratio for CSC

A

=H/O

Just think 1/sin

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8
Q

Right triangle ratio for SEC

A

=H/A

Just think 1/cos

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9
Q

Right triangle ratio for COT

A

=A/O

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10
Q

What is the reciprocal to the following trig function?

COT

A

1/TAN

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11
Q

What is the reciprocal to the following trig function?

SEC

A

1/COS

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12
Q

What is the reciprocal to the following trig function?

CSC

A

1/SIN

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13
Q

State which quadrant is described

SIN > 1 and COS > 1

A

I

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14
Q

State which quadrant is described

SIN > 1 and COS < 1

A

II

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15
Q

State which quadrant is described

SIN < 1 and COS < 1

A

III

16
Q

What are the maximum and minimum values for

Y = SIN X and 
Y = COS X
A

-1 and 1

17
Q

What is the period for

Y = SIN X and 
Y = COS X
A

360°

18
Q

What are the zeros for

Y = SIN X and 
Y = COS X
A

0 and 180

19
Q

Convert 180° to radians

A

pi

180 * pi / 180

20
Q

Define the popular divisions in the first quadrant of the unit circle:

Radians

A 
0
Pi/6
Pi/4
Pi/3
Pi/2
21
Q

Define the popular divisions in the first quadrant of the unit circle:

degrees

A 
0
30
45
60
90
22
Q

Define the popular divisions in the first quadrant of the unit circle:

fractions

A 
1,0
Sqr(3)/2 , 1/2
Sqr(2)/2 , Sqr(2)/2
1/2 , Sqr(3)/2
0,1

Trig (1 decks)

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