Law of Sines & Cosines Worksheets
Trigonometry Worksheets
There are six sets of Trigonometry worksheets:
- Sin, Cos, Tan
- Sin & Cos of Complementary Angles
- Find Missing Sides
- Find Missing Angles
- Area of Triangle using Sine
- Law of Sines and Cosines
Law of Sines and Cosines Worksheets
In these free math worksheets, students learn to how to find missing sides and angles using law of sines and cosines.
There are two sets of Law of Sines and Cosines worksheets.
How to use the Law of Sines and Cosines?
Law of Sines
The Law of Sines is a trigonometric law that relates the lengths of the sides of any triangle to the sines of its angles. For any triangle with sides of length a, b, and c, and opposite angles A, B, and C, the Law of Sines is expressed as follows:
a/sin(A) = b/sin(B) = c/sin(C)
Note that the Law of Sines is applicable to all types of triangles, not just right triangles.
Law of Cosines
The Law of Cosines is another trigonometric law that relates the lengths of the sides of a triangle to the cosine of one of its angles. For any triangle with sides of length a, b, and c, and opposite angles A, B, and
C, the Law of Cosines is expressed as follows:
c2 = a2 + b2 - 2ab cos(C)
Have a look at this video if you need to review how to use the Law of Sines and Cosines.
Click on the following worksheet to get a printable pdf document.
Scroll down the page for more Law of Sines and Cosines Worksheets.
More Law of Sines and Cosines Worksheets
Printable
(Answers on the second page.)
Law of Sines & Cosines Worksheet #1
Law of Sines & Cosines Worksheet #2
Online
Trigonometry (sine, cosine, tangent)
Trigonometry (sine, cosine, tangent)
Trigonometry (using a calculator)
Inverse Trigonometry (using a calculator)
Trigonometry (find an unknown side)
Trigonometry (find an unknown angle)
Using Sine
Using Cosine
Using Tangent
Using Sine, Cosine or Tangent
Trigonometry Applications Problems
Law of Sines or Sine Rule
Law of Sines
Law of Cosines or Cosine Rule
Law of Cosines
Related Lessons & Worksheets
Check out our most popular games!
Fraction Concoction Game:
Master fractions in the lab: mix, add, and subtract beakers to create the perfect concoction!
Fact Family Game:
Complete fact families and master the link between addition & subtraction and multiplication & division.
Number Bond Garden:
Clear the board by matching number pairs that sum to ten in this garden-themed mental math puzzle.
Online Addition Subtraction Game:
Practice your addition and subtraction skills to help the penguin find its mummy.
We welcome your feedback, comments and questions about this site or page. Please submit your feedback or enquiries via our Feedback page.