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Free trigonometric equation calculator - solve trigonometric equations step-by-step Step-by-Step Calculator - Symbolab We will mainly use the Unit Circle to find the What is the formula of trigonometry? It says that c 2 , the square of one side of the triangle, is equal to a 2 + b 2 , the sum of the squares of the the other two sides, minus 2ab cos C, twice their product times the cosine of the opposite angle. Detailed step by step solutions to your Trigonometric Equations problems online with our math solver and solving one-step equations and inequalities worksheet. Hint : Using a calculator and your knowledge of the unit circle to determine all the angles in the range \(\left[ {0,2\pi } \right]\) for which cosecant will have this value. 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