We decided to lower the price of this product.

He smiled triumphantly.

His strong point is mathematics.

He is my best friend.

He is my best friend.

His goal was truly a miracle play.

He is good at calculating the value of rho.

He needs special support because of his low vision.

Please calculate the value of the cotangent, which is one of the trigonometric functions.

He was able to solve the complex calculation quickly.