Trigonometry of Sums and Differences of Angles HSF.TF.C.9 Grade Practice Test Questions TOC | Lumos Learning

Trigonometry of Sums and Differences of Angles HSF.TF.C.9 Question & Answer Key Resources Lumos StepUp ACT Practice Program - Mathematics

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Recall that \(\sin \left(\alpha +\beta \right)=\sin \alpha \cos \beta +\cos \alpha \sin \beta \). What is the exact value of \(\sin 255{}^\circ \)? Enter your answer, and in your own words, indicate how you arrived at the answer giving proper steps or justification.

Resource: Question

Question Type: Extended Constructed Response

Standard(s):HSF.TF.C.9HSG.SRT.A.3

Standard Description: Prove the addition and subtraction formulas for sine, cosine, and tangent and use them to solve problems.

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