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Introduction of circular functions:
Trigonometric functions or Circular functions the functions of an angle in a triangle. These are very helpful in the analysis of the properties of triangles and used to describe the relationship between the angles and side lengths of triangles.
Sine, cosine, tangent are the most popular circular functions co-secant, secant and cotangent are their respective reciprocals.
Need help with solving right triangles
On the basis of an angle in a triangle, the sine function gives the y-component of a triangle and cosine function gives the x-component. The tangent function gives the slope of a triangle.

Right Triangles for Circular Functions

If one of its angle is right angle or equal to 90 degree. The hypotenuse and the other two sides being leg₁ and leg_{2which is} opposite to the right angle ,in the Right triangle only then the triangle is said to be a right triangle .Also, find interesting topic on Solving math with formula