Answer:
cos57° = x/51
General Formulas and Concepts:
Trigonometry
- [Right Triangles Only] sin∅ = opposite over hypotenuse
- [Right Triangles Only] cos∅ = adjacent over hypotenuse
Step-by-step explanation:
Step 1: Define
We are given a right triangle. We can use trig to solve for the missing side length.
Step 2: Set up ratios
We can choose between the 2 angles and have multiple ratios to solve for x.
sin33° = x/51
cos57° = x/51
Hence, we see that the 1st option would be the correct answer.
