What is answer to this question

Which graph shows a function with a range of all real numbers greater than or equal to -1

If the value of cos330°is√3/2 then find cos 165°.

Which is a logical conclusion based on the given information? a. figure abcd is a rhombus by the definition of a rhombus. b. segment ac is congruent to segment dc by cpctc. c. angle acb is congruent to angle adc by the angle-side-angle theorem. d. triangle acd is congruent to triangle cab by the hypotenuse-leg theorem.