SAGAR SINGH - IIT DELHI
Last Activity: 14 Years ago
Dear nithin,
Basic trigonometric ratios will be defined using the right angled triangle ABC given below , to later on move to trigonometry formulas.

Trigonometric Ratios
Sin X = Opposite Side/ Hypotenuse
Cos X = Adjacent Side/ Hypotenuse
Sec X = 1/Cos X ; Csc X = 1/ Sin X; Tan X = Sin X/ Cos X; Cot X = Cos X/Sinx = 1/ Tan X
Trigonometric Formulas Sub topics
Pythagorean identities
Sin2X + Cos2 X = 1
Tan 2X + 1 = Sec2X
Cot2X + 1 = Csc2X
We are all IITians and here to help you in your IIT JEE preparation.
All the best.
If you like this answer please approve it....
win exciting gifts by answering the questions on Discussion Forum
Sagar Singh
B.Tech IIT Delhi
sagarsingh24.iitd@gmail.com