Law of Cosine vs Law of Sine

Find QR

• 34.7 km

• 2.2 km

• 13.74

• 31.1 km

Find BC

• A

• B

• C

• D

Find m<C

• A

• B

• C

• D

Find the length of Side BC.

• 33

• 24

• 12

• 29

To solve the triangle shown, you would start with which formula?

• Law of Cosines

• Law of Sines

• Heron's Formula

• Triangle sum theorem

Which law should I use for the given triangle?

• Law of Sines AFTER testing for #of Triangles

• Law of Sines then switch to Law of Cosines

• Law of Sines only

• None, use Right Triangle Trig

• Law of Cosines only

• Law of Cosines then switch to Law of Sines

​ (a)   ​​ 4. Which law should I use for the given triangle?

• Law of Sines AFTER testing for #of Triangles

• Law of Sines then switch to Law of Cosines

• Law of Sines only

• None, use Right Triangle Trig

• Law of Cosines only

• Law of Cosines then switch to Law of Sines

Solve for a.

• 28

• 56

• 22

• 45

Use law of Sines to find angle C.

Round your answer to the nearest tenth

Mathematical Equivalence

OFF

Solve for a.

• 4.28

• 8.56

• 3.22

• 9.45