Trigonometry - Overview and Identities (16 of TBD) sin(theta/2) Derived

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We will derive the identity sin(theta/2)=+/-SQRT{[1-cos(theta)]/2}.

Title search on other platforms: Trigonometry - Overview and Identities (15 of TBD) sin(2theta) and cos(2theta) Derived

Title search on other platforms: Trigonometry - Overview and Identities (17 of TBD) cos(theta/2) Derived