Posted by **john2** on Monday, March 8, 2010 at 8:29am.

verify:

tanx secx = -2tanx

- precal -
**Reiny**, Monday, March 8, 2010 at 8:44am
Can't be verified, since it is a false statement

test for any acute angle,

left side would be always positive, both the tangent and sec are positive.

But the right side is negative, not possible!

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