If `A={:[(a,b),(b,a)]:}` and `A^(2)={:[(alpha,beta),(beta,alpha)]:}` such that `beta=Kab`. Then the value of K will be___

If A=[(a,b),(b,a)] and A^(2)=[(alpha, beta),(beta, alpha)] then

If A=[{:(a,b),(b,a):}] and A^(2)=[{:(alpha, beta),(beta, alpha):}] then

If A=[(a,b),(b,a)]and A^(2)=[(alpha,beta),(beta,alpha)] , then -

If A=[[a , b] ,[ b , a]] A^(2)=[[alpha , beta] ,[ beta , a]] then

If A=[(a,b),(b,a)] and A^2=[(alpha, beta),(beta, alpha)] then (A) alpha=a^2+b^2, beta=ab (B) alpha=a^2+b^2, beta=2ab (C) alpha=a^2+b^2, beta=a^2-b^2 (D) alpha=2ab, beta=a^2+b^2

If alpha+ beta=-7 and alpha beta=10 then find the value of alpha-beta=__ .

If sin alpha-sin beta=a and cos alpha+cos beta=b then write the value of cos(alpha+beta)