If sina+sin2a 1 then cos2a+cos4a
WebFirst, group the first two terms and factor it. Then, apply the Pythagorean identity which is . Then, group the second and last term at the left side of the equation. To simplify the expression ... WebGet an answer for 'If Cos4A/ cos2B + sin4A/cos2B = 1 Then prove that: Cos4B/cos2A + sin4B/sin2A = 1 A and B being acute angles of right angled triangle.' and find homework help for other Math ...
If sina+sin2a 1 then cos2a+cos4a
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Web25 mei 2024 · If sinA + sin^2A = 1, then the value of the expression (cos^2A + cos^4A) is (a) 1 (b) 0 (c) 7 (d) 13 - Sarthaks eConnect Largest Online Education Community. Web22 mrt. 2024 · Transcript. Question 12 If sin A + sin2 A = 1, then the value of the expression (cos2 A + cos4 A) is (A) 1 (B) 1/2 (C) 2 (D) 3 Given sin A + sin2 A = 1 sin A = 1 − sin2 A …
WebIf sinA+sin 2A=1, then the value of the expression (cos 2A+cos 4A) is A 1 B 21 C 2 D 3 Medium Solution Verified by Toppr Correct option is A) sinA+sin 2=1 sinA=1−sin 2A sinA=cos 2A Now cos 2A+cos 2A.cos 2A =sinA+sin 2A =1 ... (given) Solve any question of Introduction to Trigonometry with:- Patterns of problems > Was this answer helpful? 0 0 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 ---- …
WebQ: If sinA + sin2A = 1, then cos2A + cos4A = …… (1) ½ (2) 1 (3) 2 (4) 4 A: Given that sinA+sin2A=1 sinA=1-sin2A sinA=cos2A Q: Find the exact value of the expression sin-1 (cos 2π/3). Do not use a calculator. A: From unit circle we get cos 2π/3= -1/2 Q: If sin θ = -0.9, find the value of sin θ + sin (θ + 2!) + sin (θ + 4) Web8 mrt. 2024 · Prove that \(\frac{cos2A}{1 + sin2A}\) = tan(45° – A) LIVE Course for free. Rated by 1 million+ students ... If sinA + sin2A = 1 then what is the value of cos2A + cos4A? asked Mar 2, 2024 in Trigonometry by PrashantPandey (60.0k points) trigonometry; 0 votes. 1 answer Prove that(sin2A + sin5A - sinA)/(cos2A + cos5A + cosA) ...
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 …
WebA: Given that sinA+sin2A=1 sinA=1-sin2A sinA=cos2A. Q: Find the exact value of the expression sin-1 (cos 2π/3). Do not use a calculator. A: From unit circle we get cos … microwave eggo wafflesnews in richmondWeb30 nov. 2024 · HERE IS UR ANSWER sin A +sin^2A= 1 sina+1−cos2a=1 sina−cos2a=0 sina=cos2a Squaring both sides (sina)2= (cos2a)2 sin2a=cos4a use sin2θ+cos2θ=1: 1−cos2a=cos4a 1=cos4a+cos2a Hope U understand Thanks and Mark me as the BRAINLIEST Advertisement Still have questions? Find more answers Ask your question 13. news in republic of irelandWebIf sinA + sin 2 A = 1, then the value of the expression (cos 2 A + cos 4 A) is 1. Explanation: Given, sinA + sin 2 A = 1. ⇒ sin = 1 – sin 2 A = cos 2 A .....[∵ sin 2 θ + cos 2 θ = 1] On … news in rhyl forumWeb3 dec. 2024 · By formula, Substitute in the above equation, we get Hence proved. Advertisement Anonymous1756 Cos 4 A - Cos2A = (cos2A)2 - (cosA)2 = (1- sin2A)2 - cos2A = 1 + sin4A - 2sin2A - ( 1- sin2A) =1+ sin4A - 2 sin2A -1 + sin2A =sin4A - sin2A since LHS = RHS hence proved. Advertisement New questions in Math microwave egg poacher videosWebSolution The correct option is A 2 y Explanation for the correct option. Step 1: Find the value of x 2 + y 2 Given that, sin A + sin 2 A = x and cos A + cos 2 A = y. news in recruitingWeb18 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 . ] microwave eggplant before grilling