1.

If `sintheta=1/2a n dcostheta=-(sqrt(3))/2,`then the general value of `theta`is `(n in Z)dot`A. `2n pi+(5pi)/6`B. `2n pi+pi/6`C. `2n pi+(7pi)/6`D. `2npi+pi/4`

Answer» Correct Answer - A
`sin theta=1//2` and `cos theta=-sqrt(3)//2`
`rArr theta` lies in the second quadrant.
`rArr sin theta=sin 5pi//6`,
`:. Theta=2npi+(5pi//6), n in Z`


Discussion

No Comment Found