If sina √3 2 the value of 2cot2a − 1 will be
Web28 mrt. 2024 · If sin A=1/2 , then the value of sec A is : (a) 2√3 (b) 1√3 (c) √3 (d) 1 This question is Similar to Question 5 NCERT Exemplar - MCQ Get live Maths 1-on-1 Classs … Web29 apr. 2016 · See tutors like this. Use the double-angle identity for cos (2A), which is. cos 2 A - sin 2 A =. (1 - sin 2 A) - sin 2 A =. 1 - 2sin2A. or the equivalent. cos 2 A - (1 - cos …
If sina √3 2 the value of 2cot2a − 1 will be
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Web4 jul. 2024 · Step-by-step explanation: Here we are given that the value of sinA is √3-1/2√2 , and we need to prove that the value of cos2A is √3/2 . Given : - • To Prove : - • Proof : - … Web14 okt. 2024 · sec θ and sin θ are two roots of √6 x 2 - kx + √6 = 0. Formula: If α and β are two roots of ax 2 + bx 2 + c = 0.=, then. α + β = -b/a. αβ = c/a. sin A/cos A = tan A. sec A …
WebsinA = 1/2. => A= 30°. sin 3A = sin 3×30° = sin 90° = 1. Answer. Second-Method:- sin 3A = 3.sinA - 4.sin^3 A. , putting sin A= 1/2. sin 3A = 3.(1/2.) - 4.(1/2)^3 = 3/2 - 1/2. = 1. … WebAnswer (1 of 3): SinA-CosA =(√3–1)/2 Squaring both sides Sin^2A + Cos^2A -2SinACosA = (3+1–2√3)/4 ——eq1 Sin^2A + Cos^2A =1 (Remember this property) Putting the value …
Web4 jun. 2024 · Given, sinA + sin 2 A = 1 ⇒ sinA = 1 – sin 2 A = cos 2 A ---- (1) (? sin 2 θ + cos 2 θ = 1) Squaring on both sides sin 2 A = cos 4 A ---- (2) Substitute (1) and (2) in the given expression. cos 2 A + cos 4 A = sinA + sin 2 A = 1 …
Web8 okt. 2024 · In order for those sets to be equal, we need one of the following sin a = cos a, sin a = cos 2 a, or sin a = cos 3 a. We split our search into three cases, and make use of …
Web21 mei 2024 · Using a couple of identities, I found that Sin(2A)=(4sqrt(5))/9 First, I wrote out the double angle identity for sine: sin(2A)=2sin(A)cos(A) We know the solution for sin(a) … cool game names for girlsWebsin a= 2/3 We know that: sin^2 a + cos^2 a= 1 ==> cos^2 a = 1 - sin^2 a ==> cos^2 a = 1- (2/3)^2 ==> cos^2 a = 1- 4/9 ==> cos^2 a= 5/9 ==> cos a = sqrt5/3 But a is... family-photoWeb22 sep. 2014 · The same for cos A = cos B, think of two angles in the unit circle. Cosine is the x -coordinate, so either the angles are the same (first case) or we seek the other angle that has the same x -coordinate (second case). A = B + 2 k π or A = π − B + 2 k π with k ∈ Z for sin ( A) = sin ( B). cool game for girlWebExample 1: If sin A = 3/5 then find the value of sin 3A. Solution : In this problem we have given the value of Sin A. Now we need to find the value of sin 3A. To solve this problem … family photo album amazonWeb30 aug. 2013 · If SinA+sin^2A=1then cos^2A+cos^4A=1; Trigonometry; The angle of elevation of a cloud from a point h meter above a lake is beeta and the angle of … family photo 3 boys 1 girlWeb29 mrt. 2024 · Transcript. Question 28 If 1+ sin2𝛼 = 3 sin𝛼 cos𝛼, then values of cot𝛼 are (a) −1, 1 (b) 0, 1 (c)1, 2 (d) −1, −1 Now, 1 + sin^2𝛼 = 3 sin𝛼 cos𝛼 Putting 〖𝒔𝒊𝒏〗^𝟐𝜶 + 〖𝒄𝒐𝒔 … family photo 2022Web2 okt. 2024 · 43.2k views asked Oct 2, 2024 in Mathematics by AnjaliVarma (29.6k points) If sin A = √3/2, find the value of 2cot2 A - 1. trigonometry cbse class-10 1 Answer +1 vote … family photo 2020