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...Solving trigonometric equations in sine and cosine the period of both function is other words every units y values repeat if we need to find all possible solutions then must add where k an integer initial solution examples lecture notes developed under creative commons license using openstax algebra trigonometry cnx may http org contents aca ff d e abebc involving single functions make several considerations when equation involves than problems reciprocals primary be viewed from algebraic perspective will write reciprocal solve for angles a calculator not can solved exactly only unit circle angle one special use sure it set proper mode either degrees or radians depending on criteria given problem...