Answer
all, two
Work Step by Step
In quadrant I all the six trigonometric functions are positive
Reason- x, y, and r are all positive.
In quadrant II, only $\sin\theta$ and $\csc\theta$ are positive.
Reason- y and r are positive and x is negative.
In quadrant III, only $\tan\theta$ and $\\cot\theta$ are positive.
Reason- x and y both are negative.
In quadrant IV, only $\cos\theta$ and $\sec\theta$ are positive.
Reason- y is negative and x and r are positive.
Thus In first quadrant all the six trigonometric functions are positive. In each of the other three quadrants, only two of the six functions are positive.
