" 20."sqrt(" Hea ")" Keiza "sqrt(6)cos^(-1)((5)/(13))=tan^(-1)((12)/(5))

cos^(-1).(2)/(sqrt(5)) + tan^(-1).(1)/(3) =

cos^(-1)""((2)/(sqrt(5))) + tan^(-1)""((1)/(3)) =

tan(sin^(-1)((3)/(5))+cos^(-1)((3)/(sqrt(13)))=

Which of the following is/are correct? tan[cos^(-1)(4)/(5)+tan^(-1)(2)/(3)]=(17)/(6)cos[tan^(-1)(1)/(3)+tan^(-1)(1)/(2)]=(1)/(sqrt(2))cos2tan^(-1)((1)/(3))+cos(tan^(-1)2sqrt(2))=(14)/(15)cos[2cos^(-1)(1)/(5)+sin^(-1)(1)/(5)]=-(2sqrt(6))/(6)

tan[1/2cos^(-1)((sqrt(5))/3)]=

tan(cos^(-1)(1/(5sqrt2))-sin^(-1) (4/sqrt17)) is

tan(cos^(-1)(1)/(5sqrt(2))-sin^(-1)(4)/sqrt(17)) is

tan[1/2Cos^(-1)(sqrt5/3)]=

tan ((1) / (2) (cos ^ (- 1) ((sqrt (5)) / (3)))