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Please make the diagram clear and i will be able to answer it
BTW
to prove : cot10° cot20° cot70º.cot80º. cot45°=1
proof:
=> cot 10 cot 20 tan 20 tan 10 cot 45--------- ( as cot x = tan ( 90-x) )
=> cot 45 ( as tan x = 1/ cot x )
=> so value of cot 45 = 1
therefore cot10° cot20° cot70º.cot80º. cot45°=
Explanation:
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