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If tantheta=(1)/(2) and tanphi=(1)/(3),...

If `tantheta=(1)/(2) and tanphi=(1)/(3)`, then the value of `theta+phi` is

A

`pi//6`

B

`pi`

C

zero

D

`pi//4`

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The correct Answer is:
D
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  11. If A +B+C= pi and m/C is obtuse then tan A. tan B is

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  12. If 0 < theta < 2pi, then the intervals of values of ? for which 2si...

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  13. If tantheta=x-1/(4x), then sectheta-tantheta is equal to

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  14. If sectheta=x+1/(4x), then s e ctheta+t a ntheta= x ,1/x (b) 2x ,1/(...

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  15. If piltthetalt 2pi, then sqrt((1+costheta)/(1-costheta)) is equal to

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  16. If theta lies in the second quadrant, then the value sqrt(((1-sinth...

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  17. sin^2 theta =(x+y)^2/(4xy) where x,yinR gives theta if and only if

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  19. If 0^@ltthetalt180^@ then sqrt(2+sqrt(2+sqrt(2+...+sqrt(2(1+costheta))...

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