Cosine Rule
Recent Cosine Rule Questions
-
What are the rules of sin and cos?
2 days ago, 4:38pm - The Sine rule is: a/Sin A = b/Sin B = c/Sin C The Cosine rule...
-
3 days ago, 10:43pm - The cosine rule states that, for a triangle ABC, a2 = b2 + c2...
-
How do you solve for the side of a triangle if you only have it angles?
5 days ago, 4:19pm - You can solve for sides of a triangle using only angles by us...
-
Feb 02, 5:23pm - Differentiation Rules for sine and cosine * sin'(x) = cos(x) ...
-
How do you measure an angle in a triangle using the length of the sides of the triangle?
Jan 24, 8:49pm - To measure an angle in a triangle when giving the 3 sides of ...
-
How do you solve the angles of a triangle when given the lengths of all 3 sides?
Jan 21, 10:33am - When you know 3 of a triangle's side lengths and none of its ...
-
What is the length of the hypotenuse of a 30 -60 -90 degree triangle with a longer leg of length 16?
Jan 11 2012, 2:21pm - First find the hypotenuse using the right triangle rule then ...
-
What is the formula for the cosine of sum of angles?
Dec 09 2011, 1:33pm - In trigonometry, the law of cosines (also known as the cosine...
-
Can you get a negative answer in a law of cosines problem?
Dec 07 2011, 10:50pm - In trigonometry, the law of cosines (also known as the cosine...
-
Can you tell me all of the derivitive rules?
Dec 01 2011, 8:52pm - The derivative rules are the power rule, exponential rule, si...
-
How do you get all angles in a triangle if you know all the sides using geometry?
Nov 27 2011, 12:48pm - To find the angles of a triangle, begin by using the cosine r...
-
What are the angle measures of a triangle with side lengths 9, 40, and 41?
Nov 16 2011, 9:31am - We use the cosine rule to solve this problem, this is a = b +...
-
What is the double angle rule for cosine squared of 2x?
Nov 04 2011, 10:55pm - Sin(x+x) = sin(x)cos(x) + cos(x)sin(x) = 2sin(x)cos(x)
-
What is the trig equation to find 3 angles given the 3 side lengths of a triangle?
Nov 04 2011, 12:27pm - These are the formulas used to solve triangles: The sum of th...
-
If a triangle has sides of 55,25,72. What is the largest angle?
Oct 20 2011, 9:16pm - In a given triangle the longest side is always opposite the l...
-
How do you find the lengths of a triangle if you only have the interior angle measurements?
Oct 18 2011, 1:57pm - You can use the 'sine rule' which is a/sinA+b/sinB = c/cosC. ...
-
Do the rules for sin cosine tangent apply with all triangles or just right triangles?
Oct 15 2011, 7:23pm - They only apply to right triangles when you use the SOHCOHTOA...
-
Oct 12 2011, 11:28am - The rule of cosines can find the angle. The equation is expre...
-
How do you find the area of a triangle if you have 2 side lengths and one angle degree?
Sep 30 2011, 10:23am - You will want to you the cosine rule. a = b + c - 2bc cosA. T...
-
How are the sides related in a 30-60-90 triangle?
Sep 22 2011, 3:49pm - For all triangles, angles and sides are related by the law of...
