Pure Year 2 Unit 7 Flashcards
1
Q
Expand sinA+B
A
sinAcosB + cosAsinB
2
Q
Expand sinA-B
A
sinAcosB-cosAsinB
3
Q
Expand cosA+B
A
cosAcosB - sinAsinB
4
Q
Expand cosA-B
A
cosAcosB+sinAsinB
5
Q
Expand tanA+B
A
(tanA + tanB)/(1-tanAtanB)
6
Q
Expand tanA-B
A
(tanA - tanB)/(1+tanAtanB)
7
Q
Sin2A =
A
2sinAcosA
8
Q
cos2A =
A
cos^2 A - sin^2 A
2cos^2 A - 1
1 - 2sin^2 A
9
Q
tan2A =
A
(2tanA) / (1-tan^2 A)
10
Q
For R Sin or Cos (x +or- alpha), what does R =
A
root(a^2 + b^2)
