Find the value of `cot frac(25pi)(3)^c`

Find the value of sin frac(19pi)(3)^c

Find the value of frac(cos56^@)(sin34^@)

If costheta=12/13 , 0 < theta < pi /2 , find the value of frac(1)(tan^2theta)

Find the value of tan^-1(tan(frac{pi}{6}))

If 2sinx=1 , (pi/2) < x < pi and sqrt2 cosy=1, ((3pi)/2) < y < 2pi then find the value of (frac(tanx+tany)(cosx-cosy))

Find the value of sin^-1(sin(frac{3pi}{5}))

Find the value tan (pi/5)+2tan((2pi)/5)+4cot((4pi)/5).

Convert the given angles into its equivalent values in degree,minutes and seconds: (frac(2pi)(6))^c

Find the value of the following: sin^-1(sin(frac{5pi}{3}))

Find the value of the following: tan^-1(tan(frac{pi}{4}))