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C3 Maths > Trigonometry > Flashcards

Flashcards in Trigonometry Deck (11)
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0
Q

Double angle formula for cos:

A

Cos2A = cos(^2)A - sin(^2)A

Cos2A = 2cos(^2)A - 1

Cos2A = 1 - 2sin(^2)A

1
Q

Double angle formula for sin:

A

Sin2A = 2sinAcosA

2
Q

Double angle formula for tan:

A

Tan2A = 2tanA
————-
1 - tan(^2)A

3
Q

Pythagorean expression for sin and cos:

A

sin(^2)A + cos(^2)A = 1

4
Q

Pythagorean expression for cot and cosec:

A

1 + cot(^2)A = cosec(^2)A

5
Q

Pythagorean expression for tan and sec:

A

tan(^2)A + 1 = sec(^2)A

6
Q

cosecA =

A

sinA

7
Q

secA =

A

cosA

8
Q

cotA =

A

tanA

9
Q

cotA =

A

sinA

10
Q

When using Rsin(x+-a) or Rcos(x-+a)…

A

Rcosa=b or Rsina=c and
__________
R= |b^2 + c^2 PYTHAG TO FIND R