Double Angle Formulae Flashcards Preview

Maths C3 > Double Angle Formulae > Flashcards

Flashcards in Double Angle Formulae Deck (5)
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1
Q

cos2A = 3 equations

A
  1. cos2A = 1 - 2sin^2 A
  2. cos2A = cos^2 A - sin^2 A
  3. cos2A = 2cos^2 A - 1
2
Q

sin2A = 1 equation

A

sin2A = 2sinAcosA

3
Q

tan2A = 1 equation

it’s a fraction

A

tan2A = 2tanA / 1 - tan^2 A

4
Q

arc formulae
cot X?
cosec X
sec X

A

cot X = 1/tanX = cosX/sinX

cosec X = 1/sinX

secX = 1/cosX

5
Q

cosec^2 X =

sec^2 X =

A

cosec ^2 X = 1 + cot^2 X

cot ^2 X = 1 + tan^2 X