How do you verify #cot(x)/sin(x)-tan(x)/cos(x)=csc(x)sec(x)1/(sin(x)+cos(x))# ?

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I've got this headache of a trig identity. Any advice is appreciated!

#cot(x)/sin(x)-tan(x)/cos(x)=csc(x)sec(x)1/(sin(x)+cos(x))#

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Answer 1 · 2018-05-24T15:51:10

#"This is not true so just fill in x=10° e.g. and you will see"#
#"that the equality does not hold."#

#"Nothing more to add."#