Web16 nov. 2024 · Math Secondary School answered SinA+sin2A=1 then cos2A+cos4A=? See answers Advertisement mathdude500 Answer: 1 Step-by-step explanation: please find … Web6 okt. 2024 · Given, sin A + 2 cos A = 1 Squaring both sides, we get, sin2A + 4 cos2A + 4sinA cosA = 1 4 cos2A + 4sinA cosA = 1 - sin2A = cos2A 3 cos2A + 4sinA cosA = 0 ... (i) Now, (2sinA - cosA)2 = 4sin2A + cos2A - 4sinA cosA = 4sin2A + cos2A + 3cos2A [Using (i)] = 4 (sin2A + cos2A) = 4 Thus, 2sinA - cosA = 2 Hence, proved. Find Math textbook …
Prove that sin^4A + cos^4A = 1 - 2 sin^2A·cos^2A - Toppr Ask
Web14 dec. 2016 · 1 Explanation: Our starting goal is to turn all terms into cosine. Use the identity sin2θ + cos2θ = 1. sina + 1 − cos2a = 1 sina − cos2a = 0 sina = cos2a Square both sides to get rid of the sine. (sina)2 = (cos2a)2 sin2a = cos4a Reuse sin2θ + cos2θ = 1: 1 − cos2a = cos4a 1 = cos4a + cos2a Hopefully this helps! Answer link P dilip_k Dec … Web24 feb. 2024 · sinA + sin 2 A = 1 Formula used: cos 2 A = 1 – sin 2 A Calculation: sinA + sin 2 A = 1 ---- (i) ⇒ sinA = 1 – sin 2 A ⇒ sinA = cos 2 A ---- (ii) ⇒ sin 2 A = cos 4 A ---- … thunder bay name
If sinA + Sin2A = 1 Then prove that Cos2A + Cos4A = 1 - Maths ...
Web24 jan. 2024 · If sin A + sin2 A =1,then find the value of cos 2 A + cos4 A - 7808701. iteshpal84 iteshpal84 24.01.2024 Math Secondary School answered If sin A + sin2 A =1,then find the value of cos 2 A + cos4 A See answers Advertisement Advertisement Brainly User Brainly User Answer: Web18 mrt. 2024 · Step-by-step explanation : Given :- → sin∅ + sin²∅ = 1 . To find :- → cos²∅ + cos⁴∅ . Solution :- We have, °•° sin∅ + sin²∅ = 1 . ==> sin∅ = 1 - sin²∅ . ==> sin∅ = cos²∅ . [ Squaring both side ] . ==> sin²∅ = cos⁴∅ .......... ( i ) . Now, °•° cos²∅ + cos⁴∅ . = cos²∅ + sin²∅ . [ Using ( i ) ] . = 1 . [ •°• sin²∅ + cos²∅ = 1 . ] Web24 sep. 2009 · If sinA + Sin 2 A = 1 Then prove that Cos 2 A + Cos 4 A = 1 Share with your friends 15 Follow 12 Certified by MeritNation Expert Ayushi Bafna, added an answer, on … thunder bay native