The length of perpendicular from the poi...

The length of perpendicular from the point ( ` a cos prop, a sin prop`) upon the striaght line y = x ` tan prop +c ` (where c gt 0) is

A

`c cos alpha `

B

`c sin^(2) alpha`

C

`c sec^(2) alpha `

D

` c cos ^(2) alpha `

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The correct Answer is:

A

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