Trigonometry
Which of the following cofunctions has the same value as tan167°12′\tan167\degree12^{\prime}tan167°12′?
tan77°12′\tan77\degree12^{\prime}tan77°12′
tan(−77°12′)\tan\left(-77\degree12^{\prime}\right)tan(−77°12′)
cot77°12′\cot77\degree12^{\prime}cot77°12′
cot(−77°12′)\cot\left(-77\degree12^{\prime}\right)cot(−77°12′)