Bug in function evaluation involving secant and cosecant

[rtoy]

Imported from SourceForge on 2024-07-05 22:42:55 Created by yam2016end on 2016-11-26 17:16:57 Original: https://sourceforge.net/p/maxima/bugs/3254

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A trigonometric function involving sec and cosec is not evaluated correctly. h(x,y):=cosec(y-x)sec(x)sec(y); On the other hand, the function involving cotangent function is evaluated correctly. g(x,y):=cot(y-x)(1 - 1/(1+cot(x)cot(y)));

Both functions are equivalent but, Maxima evaluates only g(x,y) correctly. In the attached output, you will see that Maxima evaluates h(x,y) wrong.

Attachments:

• https://sourceforge.net/p/maxima/bugs/3254/attachment/Maxima_Sec_Cosec_Bug.txt

[rtoy]

Imported from SourceForge on 2024-07-05 22:42:56 Created by kjak on 2016-11-26 19:52:54 Original: https://sourceforge.net/p/maxima/bugs/3254/#0f7d

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• status: open --> wont-fix

[rtoy]

Imported from SourceForge on 2024-07-05 22:42:59 Created by kjak on 2016-11-26 19:52:54 Original: https://sourceforge.net/p/maxima/bugs/3254/#4672

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In Maxima, cosecant is csc, not cosec. I'm closing this as wont-fix.