If `tanbeta=2sinalphasingammacos e c(alpha+gamma),` then `cotalpha,cotbeta,cotgamma` are in (a)A.P. (b) G.P. (c) H.P. (d) none of these

If 2 sin alpha cos beta sin gamma=sin beta sin(alpha+gamma) then tan alpha , tan beta, tan gamma are in A) A.P.B) G.P.C) H.P.D) None of these

If cos2B=(cos(A+C))/(cos(A-C)), then tan A,tan B,tan C are in (a)A.P.(b) G.P.(c) H.P.(d) none of these

log_4 5, log_20 5, log_100 5 are in (A) A.P.(C) H.P.(B) G.P.(D) none of these

In triangle ABC, if cosA+2cosB+cosC=2,t h e na ,b ,c are in (A) A.P. (B) G.P. (C) H.P. (D) none of these

If (b+c)/(a+d)= (bc)/(ad)=3 ((b-c)/(a-d)) then a,b,c,d are in (A) H.P. (B) G.P. (C) A.P. (D) none of these

If a,b,c are in A.P ,then 3^(a),3^(b),3^(c) shall be in (A) A.P (B) G.P (C) H.P (D) None of these

If a_n= int_0^pi(sin(2n-1)x)/sinx dx, then a_1a_2a_3 are in (A) A.P. (B) G.P. (C) H.P. (D) none of these

If x,y,z are in A.P. then : yz,zx,xy are in (a) A.P (b) G.P (c) H.P (d) no definite sequence

If cos A+cos B+2cos C=2 then the sides of the A B C are in A.P. (b) G.P. (c) H.P. (d) none

If a,b,c,d are distinct positive then a^n/b^ngtc^n/d^n for all epsilon N if a,b,c,d are in (A) A.P. (B) G.P. (C) H.P. (D) none of these