10. If sec 40-sec 20 2 then 0- TineZ 4) n+ TC. 3) n+ 2) TC; n E Z 1) n+ TC; nEZ 11. If sin0+ cos0=2 cos 4 then 0= 2) 2nn+tA:nEZ 3)2nn+ A;VneZ 4)2n+ 4. TO 1) 2nn + 4;nEZ 3 12. The general solution of tan 6+ tan 20+ tan 30 = 0 is 2) 0 = ntt a,neZ.where tan a = 1/ 1) 0=nT/6, ne Z only 3) Both 1 and 2 4) 0 = nnta,neZ, where tana=- (2n+Dr 13. S,: If tan p0 cotq0 then 6= 2(P+q) TC S, : If tan(esin 0)= cot(n cos0), then sin 0+ 4 2/2 2) S, is true, S, is false 1) Both S, and S, are correct 3) S, is false, S, is true 4) neither S, nor S, is true 14. The general solution of the equation sin o0 X-cos0 r=1 is 1) 2nt+- ,nel 2) nt +,n EI 3) nt +,nel 4 4) 2nn -nEl 15. If log, (2+4 cos x)= 21then x 2) mt tne z 3) nn tneZ 1) nt 4) (2n+1)n 16. If sin 20+ cos0 = 0 thene 1) 2nn-;neZ 2) 2mT+:nEZ 2nt 3) ne Z 3. 2nt 4) 3 6. 4 17. General solution of 2nx+2cos x 2 is 1) n - 4 5T 2) 2nn + 4 3) nn +(-1)" ;neZ 4) 2ntt- 18. If 6. sin 0,cose, tan 0 are in G.P., then e is equal to (ne Z) 4 1) 2nt + T 19. JEI +sin x+sin x+ =4+2v3,0