Use a double-angle formula to rewrite the expression calculator is a mathematical tool that helps to solve math equations.
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Double Angle Calculator Tutorial With Given You must begin by choosing the identity you would like to calculate from the dropdown list. Once the identity has been chosen you have to chose the given function and ratio. for example: $\tan=\frac {5} {8}$. Once a function and ratio are known you may choose the quadrant of the central angle.
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1 Answer. votes. Step 1 : The expression is . Common out from the expression. Double-angle formula : . . The expression can be written as .