" याि "(A)/(-15^(@)" तो "cot A=cdots*)

cot 15^(@) + cot 75^(@) + cot 315^(@) =

Prove that "cos" (2pi)/15 cdot "cos"(4pi)/15 cdot "cos" (8pi)/15 "cos"(14pi)/15=1/(16)

tan15^(@)-cot15^(@)=

The value of cot5^(@)*cot15^(@)* cot 25^(@)* cot 35^(@)* cot45^(@) * cot 55^(@) * cot65^(@) * cot 75^(@) * cot 85^(@) is ________

If cot ""^(A)/(2) : cot ""(B) /(2) : cot "" ( C )/(2) = 1: 4: 15 , then largest angle is

If theta=9^@ , then what is the value of cot theta cot2 theta cot3 theta cot4 theta cot5 theta cot6 theta cot7 theta cot8 theta cot9 theta ? यदि theta=9^@ ,तो cot theta cot2 theta cot3 theta cot4 theta cot5 theta cot6 theta cot7 theta cot8 theta cot9 theta का मान क्या होगा?

cot (15^(@) -A) + tan(15^(@) + A) =

cot (A+15^(@))- tan(A-15^(@))=

cot((-15pi)/4)