Posted by **Charles** on Wednesday, October 8, 2008 at 8:48pm.

What does sec^2(-2) equal? Can you explain why?

- Math (Trig) -
**Reiny**, Wednesday, October 8, 2008 at 8:54pm
You want 1/cos^2 (-2)

i.e. you want the cosine of -2 radians, then square that result, and finally divide 1 by that.

I got 5.7744

- Math (Trig) -
**bobpursley**, Wednesday, October 8, 2008 at 9:00pm
sec (-2radian)=-2.40 by calculator

square that, and you get...

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