20. If sin 0+sin @cos0+cos 0=1, then 0=(nez) TO b) 2nn + 2. d) nT a) 2nn c) 2nn - 21. Let x) = x and g(x)-sinx for all xER. Then the set of all x satisfying (fogogof))3(gogo/() where (fog)(x) =ig(), is a) +Vnt,ne {0,1,2,.} b) +Vnn,ne {1,2,.} TO c) +2nn,ne{.,-2,-1,0,1.2..) d) 2nt,ne{..-2,-1,0.1,2..} 2. 3x + sin are 22. The values of x. between 0 and 2n. satisfying the equation cos3x+cos 2x = sin 2. 9n c) 13 d) 7 a) b) 23. The solution of system of simulataneous equations for x and y: 4+3 = 1, 5x16 2x3 coy2 d) 2mt tmeZ TE a) x= n +(-1)"neZ b) y= 2mn +meZ c) x= nT +(-1)"neZ 6 24. If sin x+- sin 3x = sin x sin 3x then x= c) nE; neZ a) 6' Linked comprehension type questions b+ sin x beosx ,beR %3D Let 2 cos 2.x-1 (cos x-3 sin x)tan x 25. Equation has solutions if b) be(-,1) - a) be -o. d) be c) heR- 26. For any value of b for which the equation has a solution, the number of solution when ve (0,2n) are always b) depends upon value of b a) infinite d) two e) four 75