1)What Is Cos(150) ,sin(150), tan(150)

What is the effect on the graph of the function f(x)=x when f(x) is replaced with -f(x)+4

The perimeter of ? cde is 55 cm. a rhombus dmfn is inscribed in this triangle so that vertices m, f, and n lie on the sides cd , ce , and de respectively. find cd and de if cf=8 cm and ef=12 cm. the answer is not cd=20 and de=15. i have tried that one, it does not work.

3. simplify. 312⋅312 4. rewrite n√xm using a rational expression.