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Find the set of values of lambda in R su...

Find the set of values of `lambda in R` such that `tan^(2) theta + sec theta = lambda` holds for some `theta` .

A

`(-oo, 1]`

B

`(-oo, -1]`

C

`phi`

D

`[1, oo)`

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The correct Answer is:
D
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ARIHANT MATHS ENGLISH-TRIGONOMETRIC FUNCTIONS AND IDENTITIES-Exercise (Questions Asked In Previous 13 Years Exam)
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