Posted by Amy on Tuesday, March 1, 2011 at 9:42pm.
are those degrees ?
I will assume you are familiar with the basic identities.
1 + tan^2 (5°) - csc^2 (85)
= sec^2 (5) - csc^2(85
but sec Ø = csc(90-Ø)
so sec(5) = csc(85)
so continuing from above
= csc^2(85) - csc^2(85)
Correct if you work in degrees.
For details, see response:
now, since they are the same angles, I will call that angle T
yes, they are degrees, thank you soo much!
geepers, three folks knew how to do it. I bet millions of others have laboured thru it also.
And all within one minute of each other !
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