Trig Identities and Equations B1 Ch10 Flashcards by owen Knowles

Q

What can be used to help with trig ratios?

A

A unit circle with its centre at the origin

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Q

In a unit circle what does CosX equal?

A

The x coordinate of P

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Q

In a unit circle what does SinX equal?

A

The y coordinate of P

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Q

In a unit circle what does tanX equal?

A

The gradient of OP

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Q

Sin30

A

1/2

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Q

Sin45

A

Route2/2

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Q

Sin60

A

Route3/2

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Q

Sin90

A

1

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Q

Cos30

A

Route3/2

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Q

Cos45

A

Route2/2

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Q

Cos60

A

1/2

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Q

Cos90

A

0

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Q

Tan30

A

Route3/3

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Q

Tan45

A

1

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Q

Tan60

A

Route3

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Q

Tan90

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A

Infinity

Q

What equation links Sin² and Cos²?

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A

Sin²(X)+Cos²(X)=1

Q

What equation links tan Sin and cos

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A

TanX=SinX/CosX

Q

What is the principle value?

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A

The angle you get when you use the inverse trig functions