Woods, Frederick S. (Frederick Shenstone), 1864-, Bailey, Frederick H. (Frederick Harold), 1865- · Boston, New York [etc.] Ginn and Company · leaf 59
quation. We may solve this example by the method used in solving Ex. 1, butsince the equation is of the second degree, the following method is very ,desirable. Rewriting, we have 16 (x2 + 4 x) + 25 O2 - 6 y) = 111;whence 16 (x2 + 4 x + 4) + 25 (y* - 6 y + 9) = 400,or 10(x + 2)-+25(?/-3)2=400.… … 19. Change of direction of axes. Case I. Rotation of axes. Let OX and OY (fig. 47) be theoriginal axes, and OX and OY be the new axes, making Z $with OX and OY respectively. Then ZXOY= 90° + <f> andZYOX= 90°- (f>. Let P be any point in the plane,its coordinates being x and y withrespect to…
Geometry, Analytic · Calculus
Internet Archive · California Digital Library · Public Domain Mark 1.0. Free to use for anything.
