Trigonometric

Er, Sir? What's written on the blackboard isn't an exponential function but a trigonometric one ...

I think that for many people learning the trigonometric functions is meaningless.

The derivatives of the inverse trigonometric functions are algebraic.

"What will trigonometric functions ever do for me in the future?!" "If you have time to whine, why don't get your housework done quickly instead?!"

Scientists have discovered that a 3700-year-old Babylonian clay tablet was in fact the world's oldest trigonometric table.

This ancient Babylonian trigonometric table is in some respects superior to modern trigonometry.

Hey, sir, the function on the blackboard is not exponential, but trigonometric.

The trigonometric functions sine, cosine, and tangent relate the various sides and angles of a triangle.

The trigonometric functions satisfy a wide array of notable algebraic identities.