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If secalpha+tanalpha=m, " then " sec^(4...

If `secalpha+tanalpha=m, " then " sec^(4)alpha-tan^(4)alpha-2sec alpha tan alpha` is ___________.

A

`m^(2)`

B

`-m^(2)`

C

`(1)/(m^(2))`

D

`(-1)/(m^(2))`

Text Solution

Verified by Experts

The correct Answer is:
C
Simplify the given expression and find `secalpha-tanalpha`.
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