C4 Flashcards by Luke Armstrong

Q

The sum of angles?

Sin (A+-B)..

A

SinAcosB+-CosAsinB

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Q

The sum of angles

Cos (A+-B)..

A

cosAcosB-+sinAsinB

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Q

Sum of angles

tan (A+-B)= tanA+-tanB
1-+ tanAtanB

A

tan (A+-B)= tanA+-tanB

1-+ tanAtanB

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Q

Sin2A=

A

2sinAcosA

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Q

Cos2A=

A

=Cos^2A-sin^2A

=2Cos^2A-1

=1-2sin^2A

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Q

Tan2A

A

2tanA

1- tan^2A

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