# Maths D

Home > Preview

The flashcards below were created by user Anonymous on FreezingBlue Flashcards.

1. Sin2 + Cos2 =
Sin2 + Cos2 = 1
2. Sin (A+/-B) =
Sin (A+/-B) = Sin A.Cos B +/- Cos A.Sin B
3. Cos (A +/- B) =
Cos (A +/- B) = Cos A.Cos B -/+ Sin A.Sin B
4. Tan (A +/- B) =
• Tan (A +/- B) = Tan A +/- Tan B
• ........................1 -/+ Tan A.Tan B
5. Sin 2A =
Sin 2A = 2.Sin A.Cos B
6. Cos 2A =
• Cos 2A =
• - Cos2 A - Sin2 A
• - 2.Cos2 A - 1
• - 1 - 2.Sin2 A
7. Tan 2A =
• Tan 2A = 2.Tan A
• ..............1 - Tan2 A
8. 2.Sin A.Cos B =
2.Sin A.Cos B = Sin (A + B) + Sin (A - B)
9. 2.Cos A.Cos B =
2.Cos A.Cos B = Cos (A + B) + Cos (A - B)
10. 2.Sin A.Sin B =
2.Sin A.Sin B = Cos (A - B) - Cos (A + B)
11. Sin A +/- Sin B =
Sin A +/- Sin B = 2.Sin.1/2.(A +/- B).Cos.1/2.(A -/+ B)
12. Cos A + Cos B =
Cos A + Cos B = 2.Cos.1/2.(A + B).Cos.1/2.(A - B)
13. Cos A - Cos B =
Cos A - Cos B = -2.Sin.1/2.(A + B).Sin.1/2.(A - B)

### Card Set Information

 Author: Anonymous ID: 117175 Filename: Maths D Updated: 2011-11-16 04:34:41 Tags: cos sin Folders: Description: Sin Cos Tan Rules Show Answers:

What would you like to do?

Home > Flashcards > Print Preview