Half Angles Flashcards by S R Munyem

Q

sinA

A

2sin(A/2)cos(A/2)

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Q

cosA

A

cos²(A/2) - sin²(A/2)

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Q

sinA In terms of tangent

A

2tan(A/2)
1 + tan²(A/2)

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Q

cosA in terms of tangent

A

1 - tan²(A/2)
1 + tan²(A/2)

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Q

tanA

A

2tan(A/2)
1 - tan²(A/2)

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