2 1 This requires trigonometric functions. Because my mobile phone can't take pictures. I will introduce you step by step. (I didn't read Question 22) First, you draw a number axis on the paper. (Note the arrow, positive direction, origin) The first item required on the paper is to draw a negative root sign of two. We know that. The sum of the hypotenuse of a triangle is equal to the sum of the other two sides.