In any triangle abc if cosa sinb2sinc then
WebQ.9 If in a ABC, sin3A + sin3B + sin3C = 3 sinA · sinB · sinC then (A) ABC may be a scalene triangle (B) ABC is a right triangle (C) ABC is an obtuse angled triangle (D) ABC is an equilateral triangle. Q.10 In a triangle ABC, CH and CM are the lengths of the altitude and median to the base AB. WebFeb 18, 2024 · A Computer Science portal for geeks. It contains well written, well thought and well explained computer science and programming articles, quizzes and practice/competitive programming/company interview Questions.
In any triangle abc if cosa sinb2sinc then
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WebIn this case, use The Law of Sines first to find either one of the other two angles, then use Angles of a Triangle to find the third angle, then The Law of Sines again to find the final … WebFeb 10, 2024 · In any triangle ABC, prove that sin2A + sin2B – sin2C = 4cosA cosBsinC. class-12 Share It On Facebook Twitter 1 Answer +1 vote answered Feb 10, 2024 by Beepin (59.2k points) selected Feb 11, 2024 by KumkumBharti Best answer LHS = sin 2a + sin 2B – sin 2C = 2sin (A + B) cos (A – B) – 2 sin C cos C {A + B + C = 180° A + B = 180 – c}
WebGeometrically, if and only if these two unit vector coincides. This in turn implies and . By sine law, the two sides opposites to angle , have equal length. So the triangle is an right angled isosceles triangle and . Alternatively, one can use the identity to conclude and hence . Share Cite Follow edited Aug 17, 2013 at 9:52 WebAnswer: Let ABC be a triangle with A = 3B and a = 2b. Using the law of sines, we take: a/(sinA) = b/(sinB) => 2b/(sin(3B)) = b/(sinB) => 2sinB = sin(3B) => 2sinB = 3 ...
WebIf cosA = sinB/ (2sinC) , prove that ABC is isosceles. Question If cosA=sinB/(2sinC), prove that ABC is isosceles. Medium Solution Verified by Toppr Since cosA= 2sinCsinB, we have … Weband sides are called six elements of the triangle. Prove that in any triangle, the lengths of the sides are proportional to the sines of the angles opposite to the sides, i.e. a b c sinA sinB sinC Proof : In ' ABC, in Fig. 5.1 [(i), (ii) and (iii)], BC = a, CA = b and AB = c and C is acute angle in (i), right angle in (ii) and obtuse angle in ...
WebCalculate the area of the triangle DKU if vertex U lies online LB. A triangle 8 A triangle has a base of 9.2 feet and a height of 4.8 feet. What is the area of the triangle? The triangles The triangles ABC and A'B'C 'are similar, with a …
A + B = 180° - C ii) Applying tan (A + B) = tan (180° - C), we get tan (A) + tan (B) + tan (C) = tan (A)*tan (B)*tan (C) iii) As given tan (A) + tan (B) + tan (C) = 100; from the above, we have tan (A)*tan (B)*tan (C) is also = 100 diamond grayscale lyricscircular sawmill bitsWebDec 24, 2024 · In a ∆ABC, cosC + cosA/c + a + cosB/b is equal to (A) 1/a (B) 1/b (C) 1/c (D) c + a/b properties of triangles jee jee mains 1 Answer +1 vote answered Dec 24, 2024 by RiteshBharti (54.1k points) selected Dec 24, 2024 by SudhirMandal Best answer Correct option (b) 1/b We have = a + c/b (c + a) (using projection formulae) = 1/b circular saw marks on woodWebJun 27, 2016 · Explanation: Multiplying both sides by 2 in given equality cosAcosB + sinAsinBsinC = 1, we get 2cosAcosB +2sinAsinBsinC = 2 or 2cosAcosB +2sinAsinBsinC = (sin2A +cos2A) + (sin2B + cos2B) or (cos2A+ cos2B − 2cosAcosB) +(sin2A+ sin2B −2sinAsinB) + 2sinAsinB − 2sinAsinBsinC = 0 or or (cosA− cosB)2 + (sinA −sinB)2 + … circular sawmill teeth sharpenerWebIf two sides a,b and angle A be such that two triangles are formed, then the sum of two values of the third side is Medium View solution > In ΔABC if the angles A, B, C are in A.P. then a 2−ac+c 2a+c is equal to Medium View solution > View more Get the Free Answr app Click a picture with our app and get instant verified solutions OR diamond gray clothes dryersWebMay 26, 2024 · If any triangle ABC A B C , that: a sin(B − C) b2 − c2 = b sin(C − A) c2 − a2 = c sin(A − B) a2 − b2 a sin ( B - C) b 2 - c 2 = b sin ( C - A) c 2 - a 2 = c sin ( A - B) a 2 - b 2. … diamond greenhouse anchorageWebJul 12, 2024 · if cosa=sinb/2sinc then triangle is If cosA = sinB/ (2sinC) , prove that ABC is isosceles In a ∆ABC, if cos a = SinB/2SinC What is the triangle ABC if cosB=sinA/2sinC #math. circular saw masonry blade lowes