Trigonometric functions are one of the basic concepts in mathematics.

Calculating the value of secant, one of the trigonometric functions, is difficult.

We decided to lower the price of this product.

This problem is very difficult.

He ate one apple.

His answer was confirmed to be correct.

He is relatively an early riser.

Please divide this pie into two.

He cut the apple and ate it.

The success of this project is largely due to the proportion of effort from team members.