What does $-csc(arccot(7))+2csc(arctan(5))$ equal?

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Answer 1 · 2016-04-07T07:36:49

$-5.03146$

The solution

$-csc(cot^-1 (7))+2*csc(tan^-1 (5))$

$-csc(8.130102^@)+2*csc(78.69006^@)$

$-7.07107+2(1.0198)$

$-5.03146$

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What does -csc(arccot(7))+2csc(arctan(5))-csc(arccot(7))+2csc(arctan(5)) equal?