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

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

Find the value of cosec(1020^(@))=cosec(3xx360^(@)-60^(@)) =-cosec60^(@)=-(2)/(sqrt(3))

Find the value of "cosec"70^(@)-sec20^(@)

Find the sum of the series cosec theta+csc2 theta+csc4 theta+... to nterms .

Find the value of cot^(2)A - "cosec"^(2)A.

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

Find the value of sqrt(cosec^(2) 45^(@) - cot^(2) 45^(@))

Find the principal value of cosec^(-1)(-2)