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adjoining the angle Article change gears common fraction complex fraction compound gears continued fractions convergent Cosine Sine Cotan crank diametral pitch dividing head divisor EXAMPLE excess of 9's EXERCISE factors feed spiral feet per minute find angle find the length find the measurement find the value frustums gash given angle given number grouping symbols hob feeds hypotenuse imaginary simple gears improper fraction lathe lead screw left-hand hob mixed number move the slide multiplied number of divisions number of revolutions number of teeth oblique triangle obtained opposite the angle perpendicular pitch diameter pitch line plug pressure angle PROBLEM rack ratio reciprocal Reduce revolve as shown right triangle right-hand hob Secant Cosec shaft side adjoining side opposite similar figures SINE BAR Sine Cosine Sine Cosine Tan SOLUTION spindle spiral gear square root subtracted tangent threads per inch tooth to tooth Trigonometric Tables whole number worm wheel