जब भी मै बच्चो से पूछता हूँ कि sin *x *and cosec *x*, II^{nd} quadrant में positive क्यों होता है? cos *x* and sec *x*, IV^{th} में और tan *x *and cot *x* III^{rd} में? हमेशा answer आता हैं, Sir, ALL SCHOOL TO COLLEGE OR ADD SUGAR TO COFFEE, etc. कुछ ही बच्चों को इसका सही reason पता होता है .

Let’s see the exact reason.

1. **I ^{st} Quadrant**

**2. ****II ^{nd} Quadrant**

**3. ****III ^{rd} Quadrant**

**4. ****IV ^{th} Quadrant **

**Therefore,**

- All trigonometric ratios are positive in first quadrant.
- sin and cosec are positive in second quadrant.
- tan and cot are positive in third quadrant.
- cos and sec are positive in fourth quadrant.