7. 10x2 - dx Cot(10x3) 8. sec( sin x ) tan(sin x) -dx 9. cos( XX) dx secx ans : } In sec(10x3) + c
7. 10x2 - dx Cot(10x3) 8. sec( sin x ) tan(sin x) -dx 9. cos( XX) dx secx ans : } In sec(10x3) + c ans : sec(sin x) + c ans : In sec(xx) + tan(xx) +c Use the extended substitution method for these two problems below: 10. [tut -4 dt 11. [(x +1) 2-xdx ans : 2(t - 4)3+ 3(1 -4) + c ans : - 2 (2 - x ) + 3 (2 - x)= + c
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