### Integration of Trig Functions Part II

Be careful of the negative signs when integrating sin and cos functions

Question 1
a)

Note the absence of the negative sign
We divide by 2 as the differentiation of 2x is 2

b)

Note the presence of the negative sign
We divide by 2 as the differentiation of 2x is 2

Question 2
a)

Note the presence of the negative sign

b)

Note the absence of the negative sign