12(a)Trigonometric Graphs Sinusoidal ModelsEasy2 marksSketch the graph of y=cosx for 0∘≤x≤360∘.PenEraserUndoRedoClearDraw with the mouse or a finger.Grade answerSolutionGrading criteria
12(b)Trigonometric Identities EquationsMedium3 marksSolve the equation 3cosx+1=0 for 0∘≤x≤360∘.Smaller solutionx=∘Larger solutionx=∘Grade answerSolutionGrading criteria