Find the sign of the : `cosec (-3020^@)`.

Find the sign of the : cos (-2000^@)

Find the sign of the : tan 2500^@

FInd the sign of sec2000^@

Find the value of : cosec^(2)60^(@)-tan^(2)30^(@)

Find the value of : cosec^(2)60^(@)-tan^(2)30^(@)

Find the solutions of the equation cos(cos^-1 x) =cosec (cosec^-1x) .

Find the principal value of Cosec (2)

Find the value of √3 cosec 20° – sec 20°.

Find the sum of the series cosectheta*cosec2theta+cosec2theta*cosec 3theta+cosec3theta*cosec 4theta+… to n tems

Find the values of the following trigonometric ratio: cosec\ (-1200^0)