Question

cot 1 degree cot2degree cot3degree
...Cot 87°cot88degree
cot 89degree= ​

Answer 1

answer: 1

cot1.cot2.cot3 ……………..cot87.cot88.cot89

we know,

cot1 =cot(90-89) = tan89

cot1.cot89 =1

in the same way ,

cot2.cot88 =1

core.cot87 =1

..…………

{cot1.cot89}{cot2.cot88}{cot3.cot87}

= 1

correct answer is 1