Question

The value of the determinant `abs ((1,0,0),(2, "cos x", "sin x"),(3, "sin x", "cos x"))` is ____________.

विकल्प

• 1

• cos2x

• 0

• sin2x

Answer 1

The value of the determinant `abs ((1,0,0),(2, "cos x", "sin x"),(3, "sin x", "cos x"))` is cos2x.

Explanation:

expanding along R₁
1(cos2x - sin2x ) = cos2x