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The numerical value of 1+(1)/(cot^(2)63^...

The numerical value of `1+(1)/(cot^(2)63^(@))-sec^(2)27^(@)+(1)/(sin^(2)63^(@))-co s ec^(2)27^(@)` is

A

1

B

2

C

`-1`

D

0

लिखित उत्तर

Verified by Experts

The correct Answer is:
d

`1+(1)/(cot^(2)63^(@))-sec^(2)27^(@)+(1)/(sin ^(2)63 ^(2))-co s ec^(2)27^(@)`
`rarr1+tan^(2) 63 ^(@)-sec^(2)27^(@)27^(@)+co s ec^(2)`
`63^(@)-co s ec^(2)27 ^ (@) `
`=1+cot^(2) 27^(@)-sec^(2)27^(@)+sec^(2)27^(@)-co s ec^(2)27^(@)`
`=1+cot^(2)27^(@)-co s ec^(2)27^(@)`
`=1-1=0`
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