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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

B

c. `sin^(2) alpha`

C

c.cos `alpha`

D

c.`sec^(2) alpha`

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The correct Answer is:
C
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