If `sec(A-2B), secA, sec(A+2B)` are in A.P. then value of `(Cos^(2)A)/(Cos^(2)B)` is less than:

If cos A + sec A = 2 then find the value of cos^(6)A + sec^(6) A = ?

In a triangleABC , if a,c,b are in A.P. then the value of (a cos B-b cos A)/(a-b) , is

In a triangleABC , if a,c,b are in A.P. then the value of (a cos B-b cos A)/(a-b) , is

If a^(2), b^(2), c^(2) are in A.P., then : (cos A)/a, (cos B)/b, (cos C)/c are in

If angles A,B,C are in A.P . , then 2cos (( A-C)/( 2))=

If sec A tan B + sec B tan A = 91 then the value of (secA secB + tanA tan B)^(2) - 91^(2) is equal to

Let sin a+sin b==(sqrt(2))/(2) and cos a+cos b=(sqrt(6))/(2) Then the value of 4sin^(2)(a+b) is less than

If cos A+cos C=2(1-cos B), then a,b,c are in A.P.

If sec(A+B)+sec(A-B)=2sec A then cos^(2)A equals

If tan x=(b)/(a) then find the value of a^(2)cos ec2x+b^(2)sec2x