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If sec 1.4=x, find the value of csc(2ta...

If sec 1.4=x, find the value of csc`(2tan^(-1)x)`.

A

0.33

B

0.87

C

1

D

3.03

Text Solution

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The correct Answer is:
D
Since sec1.4=x, `cos1.4=1/x` or `x=(1)/(cos1.4)`. Therefore, csc`(2tan^(-1)x)=1//sin(2tan^(-1)(1//cos1.4))~~3.03`. [7]
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