Complex expression

(5+i).(3-5*i)

Trigonometric functions

Express each of the six functions (ratios) in terms of angle A. Derive Sin,Cos,Tan,Cot and Cosec from a right triangle.

Deriving angles

Given the degrees to two angles of a triangle. A =65º, b = 40º Derive the degrees in the angle c.

x= 7*pi/12. Use half-angle identity to find the exact values

cos x (using the half-angle identity)

Setting up Triangles

In the attached diagram, I am in need of so help to construct the triangles to solve the problem. I know the answer is in finding unknown overall distance but cannot figure out the construction to find it. Please see the attached file for the full problem description.

Finding the Dimensions of a Form Roller

I need help setting up the triangles to solve this problem. The value of B=2.25 and the need to find the value of X. The answer of X is given as 2.0159. This problem you are given the answer and must construct the problem.

Solve for X from a Diagram : Setting up Triangles

I would like assistance in setting up the attached problem in order to solve it. A=2.875. X is the value that needs to be solved. In the book they give the value of X as 2.1091

Help with setting up problem

I would like some assistance in setting up this problem to solve. In the diagram Theta is 50 degrees and x is the unknown. Thank You

Help with setting up problem

I would like to get assistance in setting up the attached problem so that I can solve it. The value of A is 3.65 and the book gives the answer as 2.2748. thank You

Trigonometric relationships to find dimensions

See attached file for full problem description.