If the equation `sin^(-1)(x^2+x +1)+cos^(-1)(lambda x+1)=pi/2` has exactly two solutions, then the value of `lambda` is

If the equation sin^(-1)(x^2+x+1)+cos^(-1)(lambda x+1)=pi/2 has exactly two solutions for lambda in [a , b] , then the value of a+b is

If the equation sin^(-1)(x^2+x+1)+cos^(-1)(lambda x+1)=pi/2 has exactly two solutions for lambda in [a , b] , then the value of a+b is

If the equation sin^(-1)(x^2+x+1)+cos^(-1)(lambda+1)=pi/2 has exactly two solutions for lambda in [a , b] , then the value of a+b is

If the equation sin^(-1)(x^(2)+x+1)+cos^(-1)(lambda+1)=(pi)/(2) has exactly two solutions for lambda in[a,b], then the value of a+b is

If the equation sin^(-1)(x^(2)+x+1)+cos^(-1)(lambdax+1)=pi/2 has exactly two solutions for lambda in [a, b) , then the value of a + b is

If the equation sin^(-1)(x^(2)+x+1)+cos^(-1)(lamdax+1)=(pi)/2 has exactly two solution for lamda in [a,b) , then the value of a+b is

If "sin" x = lambda has exactly one solution in [0, 9 pi//4] then the number of values of lambda , is

If "sin" x = lambda has exactly one solution in [0, 9 pi//4] then the number of values of lambda , is

If the equation |x^2-5x + 6|-lambda x+7 lambda=0 has exactly 3 distinct solutions then lambda is equal to