Given $sintheta>0$ and $costheta>0$ , which quadrant does $theta$ lie?

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Answer 1 · 2018-02-23T17:55:49

quadrant I

Given: $sin theta > 0 " and "cos theta > 0$

The sine function is positive in the I & II quadrants.

The cosine function is positive in the I & IV quadrants.

This means the only quadrant that both trigonometric functions are positive is quadrant I.

Given sintheta>0sintheta>0 and costheta>0costheta>0, which quadrant does thetatheta lie?