Trigometric Function Rules Flashcards by Logan Hönig

Q

Recall the three identifies that involve cos 2ß

A

Cos2ß= cos^2ß - sin^2ß
Cos2ß= 2cos^2ß - 1
Cos2ß= 1- 2sin^2ß

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Q

Half angle identify of cos

A

Cos2/A= +/-((1+cosA)/2)^.5

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Q

Half angle identify of tan

A

Tan(ß/2)= +-((1-cosß)/(1+cosß))^.5

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Q

Sin is ___ in the first quadrant

A

Positive

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Q

Cos is ___ in the first quadrant

A

Positive

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Q

Who’s a cutie??

A

YOU ARE. YOU CAN DO THISSSS :)

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Q

Cos is __ in the 2nd quadrant

A

Negative

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Q

Sin is ____ in the 2nd quadrant

A

Positive

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Q

Cos is ___ in the 3rd quadrant

A

Negative

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Q

Sin is __ in the 3rd quadrant

A

Negative

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Q

Cos is ___ in the 4th quadrant

A

Positive

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Q

Sin is ___ in the 4th quadrant

A

Negative

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Q

Cos of 0 degrees

A

1

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Q

Sin of 0 degrees

A

0

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Q

Cos of 30 degrees

A

((3)^.5)/2

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Q

Sin of 30 degrees

A

1/2

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Q

Cos of 45 degrees

A

((2)^.5)/2

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Q

sin of 45 degrees

Study These Flashcards

A

((2)^.5)/2

Q

Cos of 60 degrees

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A

1/2

Q

Sin of 60 degrees

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A

(3)^.5
———-
2

Q

Cos of 90 degree

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A

0

Q

Sin of 90 degrees

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A

1

Q

Cos of 120 degrees

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A

-1/2

Q

Sin of 120 degrees

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A

(3)^.5
———
2

Cos of 135

(2)^.5 - ——— 2

Sin of 135

(2)^.5 ——— 2

Cos of 150

(3)^.5 - ——— 2

Sin of 150

1/2

Cos of 180

-1

Sin of 180

0

Cos of 210

(3)^.5 - ——— 2

Sin of 120

-1/2

Cos of 225

(2)^.5 - ——— 2

Sin of 225

(2)^.5 - ——— 2

Cos of 240

-1/2

Sin of 240

(3)^.5 - ——— 2

Cos of 270

0

Sin of 270

-1

Cos of 300

1/2

Sin of 300

(3)^.5 - ——— 2

cos of 315

(2)^.5 ——— 2

Sin of 315

(2)^.5 - ——— 2

cos of 330

(3)^.5 ——— 2

Sin of 330

-1/2