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shreya.
 2 years ago
Best ResponseYou've already chosen the best response.1tan ( x+ pi/2) = tan ( 90 + x) since the angle is in the second quadrant .where tan is negative. thus the negative sign. and the angle from the horizontal is 180(90+x) =90x..hence it changes to cot therefore tan(90=x) =  cotx

shubhamsrg
 2 years ago
Best ResponseYou've already chosen the best response.0To cut out on the theory, mathematically you can prove it like this : tan(pi/2 +x) = tan(pi/2  (x)) = cot(x) = cotx

ZakaullahUET
 2 years ago
Best ResponseYou've already chosen the best response.3i think u need some other method, the very basic method ? dw:1359120108418:dw

ZakaullahUET
 2 years ago
Best ResponseYou've already chosen the best response.3just put b=Pi/2 u will get 1/tanc =cotx

timo86m
 one year ago
Best ResponseYou've already chosen the best response.0tan(x + pi/2) = cotx it another way of saying cot x flipped along x axis and shifted pi/2 to right or left. I think.
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