Co-ratios and compound angles Flashcards by Georgie Altham | Brainscape

Q

Sin(90-A)

A

= cosA

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Q

Tan(90-A)

A

= cotA

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Q

Sec(90-A)

A

=cosecA

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Q

Cos(A-B)

A

cosAcosB+sinAsinB

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Q

Cos(A+B)

A

cosAcosB-sinAsinB

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Q

Sin(A+B)

A

sinAcosB+cosAsinB

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Q

Sin(A-B)

A

sinAcosB-cosAsinB

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Q

Tan(A+B)

A

tanA+tanB/1-tanA tanB

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Q

Tan(A-B)

A

tanA-tanB/1+tanA tanB

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