Trigonometry (4) Flashcards
1
Q
What is sin(A+-B)
A
sinAcosB +- cosAsinB
2
Q
sinAcosB +- cosAsinB
A
What is sin(A+=B)
3
Q
What is cos(A+-B)?
A
sinAsinB -+ cosAcosB
4
Q
sinAsinB -+ cosAcosB
A
What is cos(A+-B)?
5
Q
What is tan(A+-B)?
A
(tanA+-tanB)/(1-+tanAtanB)
6
Q
(tanA+-tanB)/(1-+tanAtanB)
A
What is tan(A+-B)?
7
Q
What is sin 2A?
A
2 sin A cos A
8
Q
2 sin A cos A
A
What is sin 2A?
9
Q
What is cos 2A?
A
cos^2 A - sin^2 A
2 cos^2 A - 1
1 - 2 sin^2 A
10
Q
cos^2 A - sin^2 A
2 cos^2 A - 1
1 - 2 sin^2 A
A
What is cos 2A?
11
Q
What is tan 2A?
A
(2 tan A)/(1 - tan^2 A)
12
Q
(2 tan A)/(1 - tan^2 A)
A
What is tan 2A?
13
Q
How to convert from sin to cos?
A
sin t = cos ((pi/2) - t)
14
Q
sin t = cos ((pi/2) - t)
A
How to convert from sin to cos?
15
Q
How to convert from cos to sin?
A
cos t = sin ((pi/2) - t)
