Question Solved1 Answer 11. Use a compound angle formula to demonstrate that sin(2-x) = -sin(x). (A/4] 2 CDs x 12. Prove that = secx. Which double angle identity of cos 2x did you use and why? [C/4] cos 2x + 1

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Transcribed Image Text: 11. Use a compound angle formula to demonstrate that sin(2-x) = -sin(x). (A/4] 2 CDs x 12. Prove that = secx. Which double angle identity of cos 2x did you use and why? [C/4] cos 2x + 1
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Transcribed Image Text: 11. Use a compound angle formula to demonstrate that sin(2-x) = -sin(x). (A/4] 2 CDs x 12. Prove that = secx. Which double angle identity of cos 2x did you use and why? [C/4] cos 2x + 1
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(11) Solution: sinSolution:{:[sin(A-B)=sin A cos B-cos A sin B.quad{:[" let "],[A=2pi],[B=n]:}],[sin(2pi-x)=sin 2pi cos x-cos 2pi sin x quad" valuy "],[=>quad sin(2pi-x)=0*cos x-(+1)sin x[[sin 2pi=0],[cos 2x=1]]],[sin(2pi-x)=-sin ... See the full answer