The area bounded by the curve y = cos x, the x-axis, and the given ordinates x = π/2 and x = π is given by the definite integral:

A = ∫[π/2 to π] cos x dx

Evaluating the integral:
∫ cos x dx = sin x

Applying the limits:
A = sin(π) – sin(π/2)
= 0 – 1
= -1

Since area cannot be negative, we take the absolute value:
A = 1 square unit

Thus, the correct answer is: 1 sq. unit

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