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sinA. cosA. = -2cos2A. 2. a. On the ABC triangle it is known that cosA.cosB = sinA.sinB and. cosA.cosB = sinA.sinB Define the shape of the ABC triangle and the ... Sep 16, 2002 ... sina. sinA. = sinb. sinB. = sinc. sinC. Cosine Rule sides. Cosine Rule angles cosa = cosbcosc+sinbsinccosA cosb= cosccosa+sincsinacosB cosc ... SINA Centurion Palace - Antinoo's Restaurant is at SINA Centurion Palace - Antinoo's Restaurant. ... cosa!!! 2 wks. 󱘫. Top fan. Carlo Garaffo.. 3 wks ... May 12, 2018 ... Explanation: ... cotA=512 --> A could be in Q. 1 or Q. 3. sin2A=1−cos2 ... Jun 25, 2021 ... (sin A+1+cos A)(sin A-1+cos A)(sec A csc A) Rightarrow (( sin A+cos A)^2-1)(sec A csc A) Rightarrow (sin^2 A+cos^2 A+2sin A cos A-1)(sec y's-y'sub-sina (cosa + sina tanẞ) sina (cosa + sina tanẞ). Zc b. (17) where a is the radius of the circle circumscribing the imaged calibration point, z, is ... ‑‑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 ... Definition of Sec and Tan = 1/Cos2A - Sin2A/Cos2A Combining Fractions = (1 - Sin2A) / (Cos2A) Apply Double Angle Formula = (1 - 2SinACosA Oct 28, 2013 ... ⇒ 2sinA cosA = 3/4 ∴ sinA cosA = 3/8 → (1) (sinA + cosA)2 = (sinA – cosA)2 + 4sinA cosA = (1/2)2 + 4(3/8) = (1/4) + (3/2) = 7/4 (sinA + ... Doubtnut is No.1 Study App and Learning App with Instant Video Solutions for NCERT Class 6, Class 7, Class 8, Class 9, Class 10, Class 11 and Class 12