The given triangle is a right triangle with sides 3, 4, and 5. The side opposite the right angle is the hypotenuse (5), and the other two sides are the legs (3 and 4).
Step 2: Use Trigonometric Ratios
To find the angle θ, we can use the trigonometric ratios. Specifically, we can use the tangent function, which is the ratio of the opposite side to the adjacent side.
Step 3: Calculate the Tangent of θ
The tangent of θ is given by:
\[ \tan(\theta) = \frac{\text{opposite}}{\text{adjacent}} = \frac{3}{4} \]
Step 4: Find θ Using the Inverse Tangent Function
To find θ, we take the inverse tangent (arctan) of \(\frac{3}{4}\):
\[ \theta = \arctan\left(\frac{3}{4}\right) \]
Final Answer
Using a calculator or trigonometric tables:
\[ \theta \approx 36.87^\circ \]