Pre-Calc rewriting a radical help!?

heyeveryone

New member
i am very confused on this question can anyone help me??

rewrite this expression as a trigonometric expression without radicals by making the following substitution. also assume that a>0

?16-25x, x=4/5sin?, -?/2 <= ? <= ?/2


please show all work so i know how u did it!!! thanks!!
 
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