OpenStax, Algebra and Trigonometry 2e §9.3 Double-Angle, Half-Angle, and Reduction Formulas · Example 3 · Trigonometry · Compound & multiple angles

Using the Double-Angle Formulas to Verify an Identity

Verify the following identity using double-angle formulas:

$1 + s in (2 θ) = (s in θ + cos θ)^{2}$

~5 minWritten answer · compare with the solution

OpenStax, Algebra and Trigonometry 2e · §9.3 Double-Angle, Half-Angle, and Reduction Formulas · Example 3

Stuck? A gentle nudge

No hints for this one.

Something off?

Workspace

Your working

Check your full solution

Upload photos of your handwritten work or a PDF, and Lemma will read it and tell you whether it's right — and where it first goes wrong if not.