1.

If f(x) = \(\begin{vmatrix}sec⁡ x & cos ⁡x & sec^2⁡ x + cot ⁡x\, cosec x \\cos^2 ⁡x & cos^2 ⁡x & cosec^2 x \\1 & cos^2 ⁡x & cos^2 ⁡x \end {vmatrix}\) then what is the value of 0∫π/2 f(x) dx = (π/4 + 8/15)?

A. (π/4 + 8/15)
B. (π/4 – 8/15)
C. (π/4 + 8/15)
D. (-π/4 + 8/15)
Answer» D.


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