Year 2 chapter 7 Flashcards
1
Q
Sin(2A) =
A
2sinAcosA
2
Q
Cos(2A) =
A
i) cos^2(A) - sin^2(A)
ii)2cos^2(A) - 1
iii)1 - 2sin^2(A)
3
Q
tan(2A) =
A
2tanA / 1-tan^2(A)
4
Q
Sin(A+B) =
A
sinAcosB + cosAsinB
5
Q
Sin(A-B) =
A
sinAcosB - cosAsinB
6
Q
Cos(A+B) =
A
cosAcosB - sinAsinB
7
Q
cos(A-B) =
A
cosAcosB + sinAsinB
8
Q
tan(A+B) =
A
tanA + tanB / 1 - tanAtanB
9
Q
tan(A-B) =
A
tanA - tanB / 1 + tanAtanB
