Trigonometry Flashcards by Unknown Unknown

Q

What is does SSS prove???

A

congruent

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Q

What is does AAA prove???

A

Similar

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Q

What is does SAS prove???

A

congruent

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Q

What is does ASA prove???

A

congruent

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Q

What is does RHS prove???

A

congruent

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Q

What law do we use for SSS???

A

cosine

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Q

What law do we use for SAS???

A

cosine

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Q

What law do we use for ASA???

A

sine

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Q

What is Pythagoras theorem???

A

a²+b²=c²

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Q

What ratio can we use to help with Pythagoras???

A

3a:4b:5c

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Q

What does sine equal???

A

opposite/hypotenuse

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Q

What does cosine equal???

A

adjacent/hypotenuse

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Q

What does tangent equal???

A

opposite/adjacent

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Q

Whats the law of sine to find sides???

A

SinA/a=SinB/b=SinC/c

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Q

Whats the law of sine to find angles???

A

a/SinA=b/SinB=c/SinC

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Q

Whats the law of cosine to find sides???

A

a²=b²+c²-2bcosA

Q

Whats the law of cosine to find angles???

A

cosB=a²+c²-b²/2ac

Q

What is does SSA prove???

A

not similar

Q

What law do we use for SSA???

A

sine

Q

What do we use to find the area of a triangle (not right angle)???

A

area=1/2absinC

Q

Whats sin(0)???

A

0

Q

Whats sin(30)???

A

1/2

Q

Whats sin(45)???

A

√2/2

Q

Whats sin(60)???

A

√3/2

Whats sin(90)???

1

Whats cos(0)???

1

Whats cos(30)???

√3/2

Whats cos(45)???

√2/2

Whats cos(60)???

1/2

Whats cos(90)???

0

Whats tan(0)???

0

Whats tan(30)???

1/√3

Whats tan(45)???

1

Whats tan(60)???

√3

Whats tan(90)???

0