Additional Mathematics 0606 / Trigonometry / 2.132.13: Quadratic in cos and cosecant equation0606/22/M/J/16 — Question 12 · 8 marksMark as done · Save for later · Show all solutions(i)Solve 8sin2A+2cosA=78\sin^{2} A + 2\cos A = 78sin2A+2cosA=7 for 0°≤A≤180°0^{\degree} \le A \le 180^{\degree}0°≤A≤180°.[4]▸ Answer(ii)Solve csc(3B+1)=2.5\csc(3B + 1) = 2.5csc(3B+1)=2.5 for 0≤B≤π0 \le B \le \pi0≤B≤π radians.[4]▸ Answer▸ Official mark scheme← 2.1: Tangent curve constants and cosine graph
