Which river flowed near the Indus Valley civilization

Which one of the following is the equation for Velocity Time relation?

If (a² − b²)sin θ + 2ab cos θ = a² + b², then tan θ =

If x + y = 7 and xy = 10, then the value of (1/x³ + 1/x³) is :

If x1x2x3 = 4(4 + x1 + x2 + x3), then what is the value of [1/(2 + x1)] + [1/(2 + x2)] + [1/(2 + x3)]?

If x sin³ θ + y cos³ θ = sin θ cos θ and x sin θ − y cos θ = 0, then the value of x² + y² equals

If P = 7 + 4√3 and PQ = 1, then what is the value of 1/P² + 1/Q²?

The simple interest accrued on a sum at the rate of 10% p.a. for two years is Rs. 5,000.

The value of = 3/4 ÷ 3/4  of 4/3 + 5/2 ÷ 2/5 of 5/4 – (2/3 + 2/3 of 5/6) is :

If x² + y² + 2x + 1 = 0, therefore the value of x³¹ + y³⁵ is

If a + b² + c² = 16, x² + y² + z² = 25 and ax + by + cz = 20, then the value of (a+b+c)/(x+y+z)