Which expression is not equal to the expression shown

Amuffin recipe, which yields 12 muffins, calls for cup of milk for every 1 cups of flour. the same recipe calls for cup of coconut for every cup of chopped apple. to yield a batch of 30 muffins, how much flour will be needed in the mix?

Tan198=asin164=? how to solve this? ?

What is the equivalent fraction for the following fraction using 5 as the multiplier? 1/2