What does tan(arcsec(2))2cos(arccot(3)) equal?

1 Answer
Apr 20, 2016

±3±(35)10 = 3.629, - 1.653, 0.1653 and -3.629, nearly.

Explanation:

If sec is positive, tan could be positive or negative.
Let a=arcsec2.seca=2andtana=±3.

So, the first term tan(arcsec2)=±3

If cot is positive, cos could be positive or negative.
Let b=arccot3.cotb=3andcosb=±310.

So, the second term 2cos(arccot3)=2cosb=±610.

Remembering that the sign choice from ± is independent for each term,
the sum is ±3±610=±3.629,±1.653, nearly. . .