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Given sinA = cosA We know that sin 45 = cos45 = 1/ root2 Hence, A = 45 degrees Therefore, 2tan 2 A + sin 2 A - 1 = 2tan 2 45 o + sin 2 45 SINA Centurion Palace - Antinoo's Restaurant is at SINA Centurion Palace - Antinoo's Restaurant. ... cosa!!! 2 wks. 󱘫. Top fan. Carlo Garaffo.. 3 wks ... = sinB cosC + sinC cosB + sinC cosA + sinAcosC. + sinAcosB + sinB cosA. = sinA(cosB + cosC) + sinB(cosC + cosA). + sinC(cosA + cosB). (9). Since 0 < sinA ≤ 1 ... Feb 20, 2018 ... Explanation: I hope that the Problem is : Prove : cos2A1−tanA+sin3AsinA−cosA=1+sinAcosA. We have, cos2A1−tanA+sin3AsinA−cosA ,. =cos2A1−sinAcosA ... May 12, 2018 ... Explanation: ... cotA=512 --> A could be in Q. 1 or Q. 3. sin2A=1−cos2 ... Definition of Sec and Tan = 1/Cos2A - Sin2A/Cos2A Combining Fractions = (1 - Sin2A) / (Cos2A) Apply Double Angle Formula = (1 - 2SinACosA Nov 11, 2015 ... ... cosA cosB - sinA sin B. 15:14, Some of you learned this mysterious formula back, last time you took trigonometry And of course if you took ... cos 2 A = sin A . tan A ( G . P ) = sin A . sin A cos A cos 3 A = sin 2 A ⇒ cos 3 A sin 2 A = 1 → ( 1 ) cos 2 A sin 2 A . ‑‑cosa ‑sina O" ‑F"' ‑' cosct sina O‑ ‑F'‑ sinat ‑cosa O S + ‑sincr cosa O S. ‑ O O 1‑r‑‑1,2‑M. r‑lt2 . 0 O 1‑. r2 ‑M‑ r2. ‑"O 1 O‑‑F" ""P"‑. + ‑1 O O S +Q == O ... 4 v33 sina cosa sino g². Page 3. Prob 2. 10 pers (r²dijnr). © Iij = fav puсs (r² dij after the rotation r₁ = Tij rj. I'j = for p'ei's (ri² dij - kйrэs. 2. +4.