Tangent 90 degrees is evaluated as undefined because tan of an angle is equal to the ratio of sin and cos of the same angle. Since, sin 90 = 1... View Article
To derive the formula for circumference let us start with definition of pi The value of Pi (π) is the ratio of the circumference of a circle... View Article
We have to prove Let us start with LHS Using the double angle formula we know that and also from the first trigonometric identity we get... View Article
Inverse function is also represented by arc cos-1(-1/2)= arccos(-1/2) arccos(- 1 / 2) Assume y = arccos(- 1 / 2). cos y = – 1 / 2 with 0... View Article