Maths

Let C be the set of all complex numbers. Let S₁ = {z∈ C:|z-2|≤1} and S₂ = {z∈ C: z(1+i)+z̄(1-i) ≥ 4}. Then, the maximum value of |z - 5/2|² for z ∈ S₁ ∩ S₂ is equal to:

Let α = maxₓ∈ᵣ{8²sin³ˣ 4⁴cos³ˣ} and β = minₓ∈ᵣ{8²sin³ˣ 4⁴cos³ˣ}. If 8x² + bx + c = 0 is a quadratic equation whose roots are α¹/⁵ and β¹/⁵, then the value of c – b is equal to :

Let A and B be two 3 x 3 real matrices such that (A² - B²) is invertible matrix. If A⁵ = B⁵ and A³B² = A²B³, then the value of the determinant of the matrix A³ + B³ is equal to :

Consider a circle C which touches the y-axis at (0, 6) and cuts off an intercept 6√5 on the x-axis. Then the radius of the circle C is equal to :

The point P(a,b) undergoes the following three transformations successively :
(a) reflection about the line y = x
(b) translation through 2 units along the positive direction of x-axis.
(c) rotation through angle π/4 about the origin in the anti-clockwise direction.
If the co-ordinates of the final position of the point P are (-1/√2, 7/√2), then the value of 2a + b is equal to :

Kindly consider the following 

Let f: R → R be defined as f(x+y)+f(x-y) = 2f(x)f(y), f(1/2) = -1. Then, the value of Σ₂₀_(k=_1) 1/(sin(k)sin(k+f(k))) is equal to :

The area of the region bounded by y - x = 2 and x² = y is equal to :

If tan(π/9), x, tan(7π/18) are in arithmetic progression and tan(π/9), y, tan(5π/18) are also in arithmetic progression, then |x - 2y| is equal to :

Let f : [0,∞) → be a function defined by f(x) = { max{sint: 0≤ t ≤x}, 0≤x≤π, 2 + cos x, x > π
Then which of the following is true?