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If Cos Theta 1 2 A 1 A Then The Value Of Cos 3theta Is

1) (1/8) (a3 + 1/a3) 2) (3/2) (a + 1/a) 3) (1/2) (a3 + 1/a3) 4) (1/3) (a3 + 1/a3)... View Article

1) sec(α/2 – π/8) 2) cos(π/8 – α/2) 3) tan(α/2 – π/8) 4) cot(α/2 – π/2) Answer: (3) tan(α/2 –... View Article

1) (1 + t)/(1 – t) 2) (1 – t)/(1 + t) 3) 2t/(1 – t) 4) 2t/(1 + t)... View Article

1) -1/√10 2) 1/√10 3) 3/√10 4) -3/√10 Answer: (1) -1/√10 Solution: Given, sin α = -3/5, where π <... View Article

1) 25/17 2) 7/25 3) 25/7 4) 24/7 Answer: (4) 24/7 Solution: Given, sin x + cos x = 1/5... View Article

1) cos 4A 2) sin 4A 3) 1 4) None of these Answer: (3) 1 Solution: cos2A(3 – 4 cos2A)2... View Article

1) θ + 2Φ = 90° 2) θ + 2Φ = 60° 3) θ + 2Φ = 30° 4) θ... View Article

1) sin(α + β)/sin(α – β) 2) cos(α – β)/cos(α + β) 3) sin(α – β)/sin(α + β) 4) cos(α... View Article

1) sin 2β 2) sin 4β 3) sin 3β 4) None of these Answer: (2) sin 4β Solution: Given, tan... View Article

1) 2 sin 2θ 2) 2 cos 2θ 3) tan 2θ 4) cot 2θ Answer: (1) 2 sin 2θ Solution:... View Article

1) 7 2) 8 3) 11 4) None of these Answer: (3) 11 Solution: Given, cos A = 3/4 32... View Article

1) tan 2A = tan B 2) tan 2A = tan2B 3) tan 2A = tan2B + 2 tan B... View Article

1) √[(a2 + b2)/ (4 – a2 – b2)] 2) √[(4 – a2 – b2)/ (a2 + b2)] 3) √[(a2... View Article

1) ±√2 2) ±√3 3) ±1/√2 4) None of these Answer: (1) ±√2 Solution: If a, b, c are in... View Article

1) √6 + √3 + √2 – 2 2) √6 – √3 + √2 – 2 3) √6 – √3... View Article

1) (1/2) tan θ 2) (1/2) cot θ 3) tan θ 4) cot θ Answer: (3) tan θ Solution: (sin... View Article

1) sin 4A 2) (1/2) sin 4A 3) (1/4) sin 4A 4) None of these Answer: (2) (1/2) sin 4A... View Article

1) sec A 2) 2 sec A 3) sec 2A 4) 2 sec 2A Answer: (4) 2 sec 2A Solution:... View Article

1) -1 2) 0 3) 1 4) None of these Answer: (2) 0 Solution: Given, tan2θ = 2 tan2Φ +... View Article

1) 2 sin x/√(sin 2x) 2) 2 cos x/√(cos 2x) 3) 2 cos x/√(sin 2x) 4) 2 sin x/√(cos 2x)... View Article