(-d)(- ) (b-c)(d-b) sin x cos x tan x =k, then be+ 14. If ak is equal to a b. ck 1+ bk a+ a 3) 4) k 15. The minimum value of the expression sino+sinB+ siny, where o, B,Y are real numbers satistying +B+Y=t is 1) positive 2) zero 3) negative 4) -3 16. If tan octan B+tan Btan y+tan y tan o+2 tan atan Btan y=1 then the value of sin o+sin B+sin y= 1) 0 2) -1 3) 1 4) 2 7-5cot0 17. If tan 0,2 tan 0+2, 3 tan 0+3 are in G.P then the value of is 9-4Vsec e-1 12 -33 33 12 1) 5 2) 28 3) 100 4) 13 18. Two ares of same length of two different circles subtended angles of 25 and 75 at their centres respectively. Then the ratio of the radii of the circles is 2) 1:3 3) 1:2 4) 2:1 1) 3 :1 19. If tan 0+ sine = m and tane-sin0=n, then 2) m + n = 3) m - n = m +n 4) m -n =4/mn 1) m2 -n = 4mn %3D cosx then 2. cosx+ sinx 20. If elsin x+sin" x+sin x+)log2-8 and0