Mathematics

Problem

Let

h(x)=\sin^{2}\!\bigl((3x^{5}+1)^{4}\bigr)

. Which of the following equals

h'(x)

? a)

60x^{4}(3x^{5}+1)^{3}\sin\!\bigl((3x^{5}+1)^{4}\bigr)\cos\!\bigl((3x^{5}+1)^{4}\bigr)

120(3x^{5}+1)^{3}\sin\!\bigl((3x^{5}+1)^{4}\bigr)\cos\!\bigl((3x^{5}+1)^{4}\bigr)

120x^{4}(3x^{5}+1)^{3}\sin\!\bigl((3x^{5}+1)^{4}\bigr)\cos\!\bigl((3x^{5}+1)^{4}\bigr)

120x^{4}(3x^{5}+1)^{4}\sin\!\bigl((3x^{5}+1)^{4}\bigr)\cos\!\bigl((3x^{5}+1)^{4}\bigr)