Convert from to .

The integral of with respect to is .

Evaluate at and at .

Simplify.

The exact value of is .

The exact value of is .

is approximately which is positive so remove the absolute value

Use the quotient property of logarithms, .

Multiply the numerator by the reciprocal of the denominator.

The absolute value is the distance between a number and zero. The distance between and is .

Multiply by .

The result can be shown in multiple forms.

Exact Form:

Decimal Form:

Evaluate integral from pi/4 to pi/2 of (cos(x))/(sin(x)) with respect to x