### LESSON 8-5 PROBLEM SOLVING LAW OF SINES AND LAW OF COSINES ANSWERS

You can start by asking yourself what you are looking for and what you are given. Draw a non-right triangle with SAS on the board, label one side 3, the next angle 45, and the other side 3. This should be a review of previous learning or aligned to the current learning. Anticipated Student Questions and Responses. The other two variables can be switched around. Find all three angle measures:

You can add this document to your saved list Sign in Available only to authorized users. What is the distance between the two airports? Draw a picture and solve this problem: Thinking about the Students consider prior knowledge: What happens when I have a right angle?

Round the length to the nearest tenth and the angle measure coines the nearest degree. It should be somewhat obvious when a formula is going to be used. What is the distance between the two airports?

## Laws of sines and cosines review

A plane is problme at an altitude of 14, ft. A pilot flying at an altitude of 12, feet sights two airports directly in front of him. Process Standards addressed in the lesson: Suggest us how to improve StudyLib For complaints, use another form.

xolving Use either the Law of Cosines or the Law of Sines to solve for the side or angle. You can use the Law of Sines to solve a triangle if you are given: Your e-mail Input it if you want to receive answer. How many degrees must competitors turn at point C?

An observer in a lighthouse is 69 ft above the water. Round to the nearest meter.

The angle of depression to one airport is 78 degrees, and the angle of depression to the second airport is 19 degrees. What happens when I have a right angle?

# Law of Sines and Law of Cosines calculator

Anticipated Student Questions and Responses. Honors Geometry Exam Practice Bank. You can add this document to your saved list Sign in Available only to authorized users. This should be a review of previous learning or aligned to the current learning. You can use the Law of Cosines to solve a triangle if you are given: Really you only need to pick one formula, you just need to know where the values go.

So when you are given the angle, the side opposite from that angle is the variable by itself on the one side of the equation. How are we supposed to memorize all of those formulas?

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Find all three angle measures:. If you know two side lengths and the included angle measure or if you know all three side lengths, you cannot use the Law of Sines.

You can use a calculator to find these values. Round to the nearest foot. Another engineer suggested using a cable attached from the top of the tower to a point 31 m from the base.

Round to the nearest tenth and show your work. Draw a picture and solve this problem: If there are any students that get the wrong answer, make sure you explain what the right answer is and why.

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ahd You can add this document to your study collection s Sign in Available only to authorized users. Go through notes transparency, explaining each section and highlighting important parts. Add this document to saved. The Seattle Space Needle casts a meter shadow. If the angle of elevation from the tip of the shadow to the top sine the Space Needle is 70 degrees, how tall is the Space Needle?

Thinking about the Students consider prior knowledge: