How do you find the measure? with pythagorean theorem again?

Sam claims that cos x =sin y if x and y are congruent angels. is sam correct ?

Which expression is not a polynomial?

In the field of thermodynamics, rankine is the unit used to measure temperature. one can convert temperature from celsius into rankine using the formula , what is the temperature in celsius corresponding to r degrees rankine? a. 9/5(c - 273) b. 9/5(c + 273) c. 5/9( c - 273) d. 5/9( c + 273)