Quadrant
Two equal lines "X- o X " ,"Y- O Y"which cross each other by the center and divide it in to 4 parts
the trigonometric ratio discussed above have different he above discussion we see signs in different quadrants. Here in Quadrant system we can remember the sing of trigonometric sing different by "ACTS".
As shown above in the figure " A" stand for All and "S "stand for sine ,"C" stand for cosine and "T" stand's for tangent.Now we will discuss about the quadrants sing in above figure one by one .
First Quadrant
In first quadrant All sing of trigonometric Are positive .i,e sin,cos,cosec tan cot sec.
Second Quadrant
In Second quadrant "Sin & its inverse cosec Are positive .other all remaining cos, tan cot ,sec are negative.
Third Quadrant
In Second quadrant "Tan" & its inverse "Cot" Are positive .other all remaining sin ,cosce. cos,sec are negative.
Four Quadrant
In forth quadrant "Cos" & its inverse "Sec" Are positive .other all remaining sin ,cosce. Tan ,Cot are negative.
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