1.

Sum of the root of the equation 2 sin^2 theta + sin^2 2theta =2, 0 le theta le pi//2 is

Answer»

`pi/2`
`3pi//4`
`7pi//2`
`5pi//12`

Solution :`4sin^2 THETA cos^2theta =2 (1-sin^2 theta)`
`rArr (2 sin^2 theta -1) cos^2 theta =0`
`rArr sin^2 theta =1//2` or `cos^2 theta =0`
`rArr theta =pi//4` or `theta=pi//2`


Discussion

No Comment Found

Related InterviewSolutions