Solve psinpi+qcospi/2+ktan2pi

$$p \sin \pi + q \cos \frac { \pi } { 2 } + k \tan 2 \pi$$

Evaluate

$$\pi n\psi$$

Solution Steps

Get the value of \cos(\frac{\pi }{2}) from trigonometric values table.

$$\psi n\pi +q\times 0+k\tan(2\pi )$$

Anything times zero gives zero.

$$\psi n\pi +0+k\tan(2\pi )$$

Get the value of \tan(2\pi ) from trigonometric values table.

$$\psi n\pi +0+k\times 0$$

Anything times zero gives zero.

$$\psi n\pi +0+0$$

Add 0 and 0 to get 0.

$$\psi n\pi$$

Differentiate w.r.t. ψ

$$\pi n$$