Use the trigonometric identity

$si{n}^2()co{s}^2()=1,.,1.$

Therefore,

Step $2$

Simplify the right side.

Step $3$

Substitute $cos(6)=u.$

Differentiate with respect to $$ on both sides.

$sin(6)d=du$

Enter an exact number.

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$5$

$*$

$1$

$2$

$3$

$4$

$5$

$6$

$ab$

W

E

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$T$