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Question 27 B0/1 pt 399 Details — Simplify sin(7x) – sin(x) cos(7x) + cos(x) to an expression involving a single trigonometric function. Question Help: Video Message instructor Submit Question Question 28 50/1 pt 33 99 Details 15 where B is in 3 Find the EXACT value of sin(A + B) if cos A = where A is in Quadrant IV and sin B = 5 Quadrant IV. Assume all angles are measured from standard position. 17 sin(A + B) = Question Help: Message instructor Submit Question Question 29 B0/1 pt 399 Details 5 where B is in 8 Find the EXACT value of cos(A + B) if sin A = where A is in Quadrant Il and sin B = 17 Quadrant II. Assume all angles are measured from standard position. 13 cos(A + B) = Question Help: D Video Message instructor Submit Question