圆形对数尺“KL-1” designed to perform mathematical operations of multiplication, division, squaring, obtaining the square root, finding the trigonometric functions of sine, cosine, tangent, as well as inverse trigonometric functions, finding the area of a circle."
圆形对数尺“KL-1” designed to perform mathematical operations of multiplication, division, squaring, obtaining the square root, finding the trigonometric functions of sine, cosine, tangent, as well as inverse trigonometric functions, finding the area of a circle."