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If (sin alpha + "cosec" alpha )^(2) + ( ...

If `(sin alpha + "cosec" alpha )^(2) + ( cos alpha + sec alpha )^(2)=k+ tan^(2) alpha + cot^(2) alpha ` then k=

A

9

B

7

C

5

D

3

Text Solution

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The correct Answer is:
B
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AAKASH SERIES-TRIGONOMETRIC RATIOS-PRATICE SHEET (EXERCISE) (LEVEL-I(MAIN) (SINGLE ANSWER TYPE QUESTIONS)
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