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(a) (8 -5)

11 23

(b) (5 -7 6)

-11 6 2

2 4 -7

Then show that

∫xsinx/(1+cos^2(x))dx within limit 0 to π=π^2/4

4 11 7

9 13 3

(a) Find the minors of 1,2 and 6.

(b) Find the cofactors of 1,2 and 6.

(c) Evaluate |A|.

(d) A^-1

Is the statement true or false?

Give a short proof or a counter example in

support of your answer.

f(x)=e^(-x)/(1+x) on [0,∞[, is ]−∞,0[ .

Is the statement true or false?

Give a short proof or a counter example in

support of your answer.

Then show that

∫xsinx/(1+cos^2(x))dx within limit 0 to π=π^2/4

point x0 . Hence, find the equations of the tangent and normal to its curve at the point

(−2,−9).