Find the exact value of cos theta tan theta 45 theta in qua
Find the exact value of cos theta tan theta = -4/5, theta in quadrant II -squareroot 41/5^5 squareroot 41/41 squareroot 41/4 -^5 squareroot 41/41
Solution
tan theta=-4/5 theta is in second quadrant
Here opposite=4 and adjacent=5
hypotenuse=sqrt(16+25)=sqrt41
cos theta is negative in second quadrant
cos theta=adjacent/hypotenuse= - 5/sqrt41
Correct option is D
