What are all the exact solutions of cos x=-sqrt3/2 on the interval pi

A(1,1) b(-3,0) c(-4,-1) d(3,-2) drag it to correct position

Charlie tosses five coins. what is the probability that all five coins will land tails up.

Asalad dressing recipe calls for 1 teaspoon of vinegar and three tablespoons of olive oil to only make 1/3 of the recipe for a single portion how much of each ingredient would you need