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Positive chemotaxis is movement toward the source of the chemical stimulus (along the chemical concentration gradient in air or water); negative chemotaxis is movement away from the source. The phenomenon is known to exist in a number of microorganisms and invertebrates.
Positive and Negative Coterminal Angles. While a positive angle is the measure of the rotation of its terminal side from positive x axis in anti clockwise direction, a negative angle is the measure of the rotation of the terminal side in the clockwise direction.xample: If Î¸ = 45Âº, then Î¸' = 45 - 360 = -315 is a negative Coterminal Angle of 45Âº. More negative Coterminal angles can be found by subtracting multiples of 360 from Î¸. like 45 - 720 = -675Âº, 45 - 1080 = -1035Âº etc. If a given angle is negative, then a positive coterminal angle is got by adding 360 to it.