Question

In the third quadrant the value of the sine function

• A. increases from 0 to 1
• B. decreases from 0 to -1
• C. increases from -1 to 0
• D. decreases from 1 to 0

Answer 1

The correct option is B

decreases from 0 to -1

The value of sine function at180 degrees is 0 and at 270 degrees it"s -1.Thus as the angle moves from 180 degrees to 270 degrees i.e. in the third quadrant , the value decreases from 0 to -1.