Apply the difference of angles identity.

Simplify each term.

The exact value of is .

Multiply by .

The exact value of is .

Multiply by .

Add and .

Expand the Trigonometric Expression cos(x-pi/2)

Skip to content
# Expand the Trigonometric Expression cos(x-pi/2)

Apply the difference of angles identity.

Simplify each term.

The exact value of is .

Multiply by .

The exact value of is .

Multiply by .

Add and .

Expand the Trigonometric Expression cos(x-pi/2)