3. () cos is given by cos 3n d none of these. a. 4 4 4. cos"" (cos (2 cot(/2-1))) is equal to a V2-1 d none of these 4 4 2-V3 The value of sin" cot sin' +cos +sec 4 a 0 c. 3 d none of these 6. If a, B(a < B) are the roots of the equation 6x+ 11xr+3 =0, then which of the following are real? a cos a h sin B c. cosec d Both cot a and cot"B . 5. 7. 14 Which of the following is/are the value of cos 5 2n a. cos h sin 10 C. cos 5 d -cos 5