[" The value of "cot10^(@).cot20^(@)],[cot60^(@).cot70^(@).cot80^(@)19]

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Find the value of cot10^(@).cot20^(@).cot60^(@).cot70^(@).cot80^(@) .

Find the value of cot15^(@).cot30^(@).cot45^(@).cot60^(@).cot75^(@)

cot70^(@)+4cos70^(@)

The value of cot70^(@)+4cos70^(@) is

Evaluate : cot 10^(@) .cot20^(@).cot30^(@).cot40^(@) ………cot90^(@) .

The value of cot41^(@).cot42^(@).cot43^(@).cot44^(@).cot45^(@).cot46^(@).cot.47^(@).cot48^(@).cot49^(@)

The value of cot10^@ cot20^@ cot60^@ cot 70^@ cot 80^@ is

The value of cot 5^(@).cot 10^(@).cot 15^(@)……cot 85^(@) is

The value of tan30^@/cot60^@ is