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If (sin^2 phi+3sin phi+2)/(cos^2 phi)=1,...

If `(sin^2 phi+3sin phi+2)/(cos^2 phi)=1`, where `-90^@< phi <90^@`, then what is the value of `(cos 2 phi+sin3 phi+cosec2 phi)` ?

A

`(2 + sqrt3)/3`

B

`(3 + 4sqrt3)/6`

C

`(9 + 4sqrt3)/6`

D

`(3 +2 sqrt3)/3`

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PINNACLE-SSC MATHS MAINS 2018 TRIGNOMETRY-Exercise
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  10. The value of sqrt((cosec ∅- cot∅)/(cosec∅ + ccot ∅)) ÷ sin∅/(1 + cos ∅...

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  14. The value of ((sinθ -cosθ )(1 + tanθ + cotθ ))/(1+sinθ cosθ ) = ? ((...

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