🔥 Double Angle Formula | Ingel Soong


Double-Angle Formula

Call   or  WhatsApp Ingel at 96726733 now to avoid disappointment!

Hurry! Limited small group tuition slots left for Physics, Chemistry and Mathematics!

H2 Chemistry H2 Physics H2 Mathematics Group Tuition
Ning (Temasek Junior College), San and Julia (Raffles Junior College), Kisha Chua (Anglo-Chinese Junior College)

Double-Angle Formula are used to convert trigonometric functions with angle 2x to functions with angle x ,

Sine Formula

                   sin\,2x = 2\, sin\,x\,cos\,x 


Cosine Formula

                   cos\,2x = 2\, cos^2x - sin^2x

                                   = 2cos^2 x - 1

                                   = 1 - 2 sin^2 x

Tangent Formula

                  tan\,2x = \frac{2tan x}{1-tan^2x}


Leave a Reply

Your email address will not be published. Required fields are marked *