The list of trigonometry questions on double angle identities for practice with solutions to learn how to use the double angle trigonometric rules as formulas in mathematical problems.
Evaluate $\dfrac{1}{\sin{10^\circ}}-\dfrac{\sqrt{3}}{\cos{10^\circ}}$
Evaluate $\dfrac{-\sin{x}+\sin{2x}}{1-\cos{x}+\cos{2x}}$
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