Hey guys, how are you? Fine? Then I can start my 2nd part. This is the second part of "All necessary trigonometry laws". In first part, I write 10 laws. If you missed or forget them you can view it again here.
All necessary trigonometry laws (part-1).
In this part we will see important eight laws. If you know this laws, then you will able to solve any hard trigonometry math. Okey let's go and see today's 8 laws.
View this laws carefully and practice it yourself and wait for third part. I will come back with third part as soon as possible. Now I say Good bye.
In this part we will see important eight laws. If you know this laws, then you will able to solve any hard trigonometry math. Okey let's go and see today's 8 laws.
- 2sinA.cosB = sin(A + B) + sin(A - B)
- 2cosA.sinB = sin(A + B) - sin(A - B)
- 2cosA.cosB = cos(A + B) + cos(A - B)
- 2sinA.sinB = cos(A - B) - cos(A + B)
- sinC + sinD = 2sinC + D2.cosC - D2
- sinC - sinD = 2cosC + D2.sinC - D2
- cosC + cosD = 2cosC + D2.cosC - D2
- cosC - cosD = 2sinC + D2.sinD - C2
View this laws carefully and practice it yourself and wait for third part. I will come back with third part as soon as possible. Now I say Good bye.
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