a) (π/4 + 8/15)
b) (π/4 – 8/15)
c) (π/4 + 8/15)
d) (-π/4 + 8/15)
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
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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
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