Linear Systems

Systems in Linear Equation or Linear Systems 

Methods for solving Linear Systems:

    1.   Elimination Method

    2.  Substitution Method

    3.  Solution by Determinants (Cramer’s Rule)

 

Oblique Triangle

Oblique Triangles:

            An oblique triangle is any triangle that is not a right triangle. It could be an acute triangle (all threee angles of the triangle are less than right angles) or it could be an obtuse triangle (one of the three angles is greater than a right angle). Actually, for the purposes of trigonometry, the class of "oblique triangles" might just as well include right triangles, too. Then the study of oblique triangles is really the study of all triangles.

è No right angle

Solution

 a.)     Law of sines

 b.)  Law of cosines

                                                                                                   

EXAMPLES:

1.)

2.)

3.)