Value of `(3+cot80^0cot20^0)/(cot80^0+cot20^0)` is equal to (a)`cot20^0` (b) `tan50^0` (c)`cot50^0` (d) `cotsqrt(20^0)`

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Value of (3+cot80^(@)cot20^(@))/(cot80^(@)+cot20^(@)) is equal to (a) cot20^(@)(b)tan50^(@)(c)cot50^(@)(d)cot sqrt(20^(@))

Value of ( 3 + cot 80^(@) cot 20^(@))/(cot 80^(@) cot 20 ^(@)) is equal to

Value of (3 + cot 80^(@) cot 20^(@))/( cot 80^(@) cot 20 ^(@))

cot 6^0 cot 42^0 cot 66^0 cot 78^0=1

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

cot6^(0)cot42^(0)cot66^(@)cot78^(@)=1

The value of (cot 54^@)/(tan 36^@)+(tan20^@)/(cot70^@) is equal to:

The value of cot5^(0)cot10^(0)......cot85^(@) is

What is cot 15 ^(@)cot 20^(@) cot 70^(@) cot 75 ^(@) equal to ?

the numerical value of tan20^(@)tan80^(@)cot50^(@) is equal to