Find the Derivative $$y = \int _ { 0 } ^ { x ^ { 8 } } \cos \sqrt { t } d t$$

question 231

Multiple Choice

Find the derivative.
- $$y = \int _ { 0 } ^ { x ^ { 8 } } \cos \sqrt { t } d t$$

• A) \(8 x ^ { 7 } \cos \left( x ^ { 4 } \right)\)
• B) \(\cos \left( x ^ { 4 } \right)\)
• C) \(\cos \left( x ^ { 4 } \right) - 1\)
• D) \(\sin \left( x ^ { 4 } \right)\)