phase 2;3 and 4 Flashcards
1
Q
sin.2a
A
2sina.cosa
2
Q
cos.2a
A
1 - 2.sin2a
3
Q
tan.2a
A
2.tana/ 1 - tan2a
4
Q
cosa.cosb
A
1/2 ( cos ( a - b ) + cos ( a + b )
5
Q
sina.sinb
A
1/2 ( cos ( a - b ) - cos ( a + b )
6
Q
sina.cosb
A
1/2(sin ( a - b ) + sin ( a + b )
7
Q
cos u + cos v
A
2 cos u + v/2 x cos u-v/2
8
Q
cosu - cos v
A
minus 2. sin u+v/2.sinu-v/2
9
Q
sin u + sin v
A
2sin u + v/2 cos u - v/2
10
Q
sin u - sin v
A
2cos.u+v/2.sinu-v/2
