Trigonometry
Trigonometry
 

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The Humongous Book of Trigonometry Problems  Schaum's Outlines: Trigonometry: With Calculator-Based Solutions  Algebra and Trigonometry (2nd Edition)  Glencoe algebra 2 with trigonometry  College Trigonometry, Fourth Edition  Trigonometry

 Trigonometry (7th Edition)   Fundamentals of Trigonometry (The Prindle, Weber  &  Schmidt Series in Mathematics)   Trigonometry   Trigonometry  Trigonometry   Trigonometry

Trigonometry    Trigonometry   Trigonometry    Trigonometry, Student Solutions Manual   Trigonometry   Analytic Trigonometry with Applications, Student Solutions Manual


Electronic Trigonometry Books

Algebra and Trigonometry   Notes in Trigonometry   The Humongous Book of Trigonometry Problems  Trigonometry  Trigonometry   Trigonometry   Trigonometry

Trigonometry   Trigonometry   Trigonometry   Trigonometry   College Trigonometry   Trigonometry
 

Examples and Solutions

Trigonometric Equations: Solve the equation, 2sinθ - sinθ = 0
                         
 This is a Quadratic Equation as in 2x - x = 0 
                                        By factorization, Sinθ(2sinθ - 1) = 0
                                                So, sinθ = 0 and 2sinθ - 1 = 0 
                                                When sinθ = 0, angle θ = 0, 180 and 360 
                                                      Also, for 2sinθ - 1 = 0
                                                             sinθ = 0.5. Angle θ = 30 and 150 

              Answer: Solutions of θ are 0, 30, 150, 180 and 360

Polar Equations: Find the Polar Equation of the Circle whose Cartesian Equation is x + y = 4x.

             If x = rcosθ and y = rsinθ
        then rcosθ + rsinθ = 4rcosθ 
               r(cosθ + sinθ) = 4rcosθ 
                     Therefore, r = 4rcosθ 
                                      r = 4cosθ

                  Polar Equation is 
r = 4cosθ

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