Express cos in terms of sin
+/(1-sin2)
1 + sin2
sin2- 1

Acertain drug is made from only two ingredients: compound a and compound b. there are 3 millimeters of compound a used for every 4 millimeters of compound b. if a chemist wants to make 693 milliliters of the drug, how many milliliters of compound a are needed?

I’m focused and need fr anyone quick

Write a sentence describing a situation that could be represented by the equation 4 ÷ 1/3 =?