Question

what are the sign convention of a coordinates in 2 quadrant​

Answer 1

Answer:

In first quadrant X and Y coordinate are positive,in second quadrant X is negative and Y is positive,In third quadrant X and Y are negative, in fourth quadrant X is positive and Y is negative. For a point in the horizontal plane X coordinate is zero and for a point in the vertical plane Y coordinate is zero.

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Answer 2

Answer:

$\ \implies$There are 4 quadrants. we measure angles from positive x axis. there is a rule called ASTC rule to represent sign convention of trigonometric ratios.

you can remember the rule as ADD SUGAR TO COFFEE.

1st quadrant - A- All are positive

2nd quadrant- S- sin and it's reciprocal cosec are positive.

3rd quadrant- T- Tan and its reciprocal cot are positive.

4th quadrant- C - Cos and it's reciprocal sec are positive.

every ratio is positive in two quadrants and negative in two quadrants.