Find the values of: `cosec 780^@`

If 10sin^4 alpha+15 cos^4 alpha=6, then find the value of 27 cosec^6 alpha+8sec^6 alpha. .......... A) 125 B) 250 C) 50 D) 75

If cosec theta = (13)/(12) , then find the values of cot theta and sin theta .

If 5 sec theta - 12 cosec theta =0, find the values of sec theta, cos theta and sin theta .

If 5 sin theta - 12 cos theta = 0 , find the values of sec theta and cosec theta .

Find the values of the following: cosec(-930^@)

If 3 sin theta - 4 cos theta = 0 , then find the values of tan theta , sec theta and cosec theta .

Find the principal values of the following: cosec^-1(2)

Find the principal values of the following: cosec^-1(sqrt2)