Formula of `2cos^2x`

Formula for 2cos^(-1)x and 3cos^(-1)x

Using the method of differentiation deduce the formula of cos2x starting the formula of tan2x.

Half Angle Formula of (cos A)/(2)(cos B)/(2)(cos C)/(2)

Formula for cos^(-1)(x)+-cos^(-1)(y)

We can sometimes use trigonometric identities to transform integrals. The integral formulas for sin^(2)x and cos^(2)x arise frequently in applications. Evaluate: intsin^(2)xdx

We can sometimes use trigonometric identities to transform integrals. The integral formulas for sin^(2)x and cos^(2)x arise frequently in applications. Evaluate: intcos^(2)xdx

We can sometimes use trigonometric identities to transform integrals. The integral formulas for sin^(2)x and cos^(2)x arise frequently in applications. Evaluate: intcos^(2)xdx

We can sometimes use trigonometric identities to transform integrals. The integral formulas for sin^(2)x and cos^(2)x arise frequently in applications. Evaluate: intsin^(2)xdx

The formula "cos"^(-1)(1-x^(2))/(1+x^(2))=2tan^(-1)x holds only for :