[" Trigonometric Funct "],[" 11."tan225^(@)cot405^(@)+tan765^(@)cot675^(@)=0.]

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Prove that tan225^(@)cot405^(@)+tan765^(@)cot675^(@)=0

Tan585^(@)Cot405^(@)+Tan675^(@)Cot765^(@)=

Prove that: tan225^(@)cot405^(@)+tan765^(@)cot675^(0)=0

Prove that tan 225^(@) cot 405^(@)+tan 765^(@) cot 675^(@)=0.

tan 585^(@) * cot 405^(@) + tan 675^(@) * cot 765^(@)=

Prove that: tan(-225^(@))cot(-405^(@))-tan(-765^(@))cot(675^(@))=0

Prove that : tan 225^@ cot 405^@+ tan 765^@ cot 675^@=0

Prove that tan225^@ cot405^@+tan675^@ cot315^@=2

Prove that: tan(-225^0)cot(-405^0)-tan(-765^0)cot(675^0)=0

Q.Prove that : tan225^(^^)(Q)cot405^(^^)@+cot675^(^^)@=0