Factor the algebraic expression below in terms of a single trigonometric function. cos x - sin^2 x - 1

me, ive been struggling so hard. make it easy to follow along? i found it answered on here but it confused me. idk

If m 17 27 90 63 ** picture is attached

The pyramid below was dissected by a horizontal plane which shape describes the pyramid horizontal cross section

Acampus club held a bake sale as a fund raiser, selling coffee, muffins, and bacon and eggs sandwiches. the club members charged $1 for a cup of coffee, 3$ for a muffin , and $4 for a back. and egg sandwich. they sold a total of 55 items , easing $119. of the club members sold 5 more muffins than cups of coffee, how many bacon and egg sandwiches he’s did they sell