Use the cosine function to find A if b = 23 m and c = 38 m in the triangle ABC. A = $oxed{}$° (Round to the nearest tenth as needed.)
Added by Manuel M.
Close
Step 1
The cosine formula is given by: cos(A) = (b^2 + c^2 - a^2) / (2bc) where a, b, and c are the lengths of the sides opposite to angles A, B, and C respectively. In this case, we are given: b = 23 m c = 38 m a is not given. We need to find angle A, so we can use Show more…
Show all steps
Your feedback will help us improve your experience
Ronald Prasad and 81 other Geometry educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
3. Solve the right triangle. Round lengths to the nearest tenth and angles to the nearest degree. a) EF = b) m∠F =
Maujee L.
In $\triangle A B C, m \angle A=40^{\circ}$ and $m \angle B=30^{\circ} .$ Find each value to the nearest tenth. Find $A C$ for $A B=81.2$ yd.
Trigonometric Identities And Equations
Area and the Law of Sines
Recommended Textbooks
Geometry A Common Core Curriculum
Geometry
18,000,000+
Students on Numerade
Trusted by students at 8,000+ universities
Watch the video solution with this free unlock.
EMAIL
PASSWORD