A text book of physics, for the use of students of science and engineering (1918)
Duncan, John, d. 1941, Starling, Sydney George, 1873- · London Macmillan · leaf 35
Fig. 6 let OB revolve anti-clockwise about O, and let it stop successivelyin positions OPl5 OP2, OP3, OP4; theangles described by OB are said tobe as follows : PxOB, in the first quadrant COB.P.,OB, in the second quadrant COA.PoOB (greater than 180°), in the third quadrant AOD.P.tOB (greater than… … FlQ. 6.—Trigonometrical ratios. is positive if above and negative if below AB. Name of ratio. Ratio as written. Value ofratio. Algebraic sign of ratio. 1st quad. 2nd quad. 3rd quad. 1th quad. sine POM sin POM - PMOP + + - — cosine POM cos POM - OMOP + - - + tangent POM - (an POM - PMOM + - + -…
Physics
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