3tan^(-1)((2)/(2+sqrt(3)))-tan^(-1)((7)/(21))=tan^(-1)((1)/(3))

Prove that 3tan^(-1)((1)/(2+sqrt(3)))-tan^(-1)((1)/(2))=tan^(-1)((1)/(3))

The value of tan^(-1)((sqrt(3))/(2))+tan^(-1)((1)/(sqrt(3))) is equal to a) tan^(-1)((5)/(sqrt(3))) b) tan^(-1)((2)/(sqrt(3))) c) tan^(-1)((1)/(2)) d) tan^(-1)((1)/(3sqrt(3)))

If 3 tan ^(-1)((1)/(2+sqrt(3)))-tan ^(-1) (1)/(x)=tan ^(-1) (1)/(3) then x=

If 3tan^(-1)((1)/(2+sqrt(3)))-(tan^(-1)1)/(x)=(tan^(-1)1)/(3) then x is equal to 1(b)2(c)3(d)sqrt(2)

tan(tan^(-1)((1)/(2))-tan^(-1)((1)/(3)))=

If 3tan^(-1)((1)/(2+sqrt3))-tan^(-1).(1)/(3)=tan^(-1).(1)/(x) , then the value of x is equal to