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If tan^(2)alpha tan^(2)beta+tan^2betatan...

If `tan^(2)alpha tan^(2)beta+tan^2betatan^(2)lamda+tan^(2)lambdatan^(2)alpha+2tan^(2)alpha tan^(2) beta tan^(2)lamda = 1` then `sin^2alpha+sin^2beta+sin^2lamda`=

A

0

B

-1

C

1

D

2

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The correct Answer is:
C
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AAKASH SERIES-TRIGONOMETRIC RATIOS-ADDITIONAL PRACTICE EXERCISE (LEVEL - II) (PRACTICE SHEET (ADVANCED) SIGNLE ANSWER TYPE QUESTIONS)
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  5. If theta = (11pi)/(6). Then cos theta + sin theta =

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