Length + The Law of Cosines - math problems
- A rhombus
A rhombus has sides of length 10 cm, and the angle between two adjacent sides is 76 degrees. Find the length of the longer diagonal of the rhombus.
AC= 40cm , angle DAB=38 , angle DCB=58 , angle DBC=90 , DB is perpendicular on AC , find BD and AD
- Scalene triangle
Solve the triangle: A = 50°, b = 13, c = 6
- Side c
In △ABC a=2, b=4 and ∠C=100°. Calculate length of the side c.
- Two boats
Two boats are located from a height of 150m above the surface of the lake at depth angles of 57° and 39°. Find the distance of both boats if the sighting device and both ships are in a plane perpendicular to the surface of the lake.
Do you want to convert length units? Cosine rule uses trigonometric SAS triangle calculator.