OpenStax, Precalculus 2e §7.3 Double-Angle, Half-Angle, and Reduction Formulas · Exercise 35 · Trigonometry · Compound & multiple angles

Double-Angle, Half-Angle, and Reduction Formulas · Exercise 35

Prove the identity given.

$s in (2 x) = - 2 s in (- x) cos (- x)$

~8 minWritten answer · compare with the solution

OpenStax, Precalculus 2e · §7.3 Double-Angle, Half-Angle, and Reduction Formulas · Exercise 35

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