`sec^(2)17^(@)-(1)/(tan^(2)73^(@))-sin17^(@)sec73^(@)` का मान क्या है ?

Options

A. 1
B. 0
C. -1
D. 2

Answer

b

Explanation

`sec^(1)17^(@)-(1)/(tan^(2)73^(@))-sin17^(@)`
Sec 73
`=sec^(2)17^(@)-cot^(2)73^(@)-sin17^(@)`
`sec(90^(@)-17^(@))`
`=sec^(2)17^(@)-cot^(2)(90^(@)-17^(@))-sin17^(@)co s ec17^(@)=sec^(2)17-tan^(2)17-1`
`=1-1[because sec^(2)theta-tan^(2)theta=1]`
=0