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2 Cos X Minus Cos 3x Minus Cos 5x Equals To

1) 16 cos3x sin2x 2) 16 sin3x cos2x 3) 4 cos3x sin2x 4) 4 sin3x cos2x Answer: (1) 16 cos3x... View Article

1) (1/2) cos 2θ 2) 0 3) -(1/2) cos 2θ 4) 1/2 Answer: (1) (1/2) cos 2θ Solution: cos2(π/6 +... View Article

1) cos A 2) 0 3) √3 sin A 4) √3 cos A Answer: (2) 0 Solution: cos A +... View Article

1) -1 2) 1 3) 1/√2 4) √3/2 Answer: (1) -1 Solution: sin 600° cos 330° + cos 120° sin... View Article

1) 2 cos x cos 2x cos 3x 2) 4 sin x cos 2x cos 3x 3) 4 cos x... View Article

1) tan 3θ 2) cot 3θ 3) tan 6θ 4) cot 6θ Answer: (3) tan 6θ Solution: (sin 3θ +... View Article

1) √3 2) -√3 3) √2 – 1 4) 1 – √2 Answer: (2) -√3 Solution: (1 – tan 2°... View Article

1) tan 3A tan 2A tan A 2) -tan 3A tan 2A tan A 3) tan A tan 2A –... View Article

1) (1/4) tan 10° 2) (1/8) cot 10° 3) (1/8) cosec 10° 4) (1/8) sec 10° Answer: (2) (1/8) cot... View Article

1) cot(A + B)/2 = [(m + 1)/(m – 1)] tan(B – A)/2 2) tan(A + B)/2 = [(m +... View Article

1) 1/4 2) 1/16 3) 3/4 4) 5/16 Answer: (4) 5/16 Solution: sin 36° sin 72° sin 108° sin 144°... View Article

1) 1/2 2) 1/4 3) 1/8 4) 1/16 Answer: (4) 1/16 Solution: cos 2π/15 cos 4π/15 cos 8π/15 cos 16π/15... View Article

1) 1 2) 2 3) 3 4) √3/2 Answer: (3) 3 Solution: tan 20° tan 40° tan 60° tan 80°... View Article

1) 1 2) -1 3) 0 4) None of these Answer: (3) 0 Solution: [(cos 12° – sin 12°)/ (cos... View Article

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

1) (1/x) + y 2) 1/xy 3) (1/x) – (1/y) 4) (1/x) + (1/y) Answer: (4) (1/x) + (1/y) Solution:... View Article

1) -56/61 2) -56/65 3) 1/65 4) -56 Answer: (2) -56/65 Solution: Given, sin θ = 12/13 where 0 <... View Article

1) -1 2) 0 3) 1 4) None of these Answer: (2) 0 Solution: 2 cos π/13 cos 9π/13 +... View Article

The time period of a system is the measure of time. The time period is the time it takes for... View Article

A motion in which the body moves to and fro repeatedly is known as an oscillation. The motion of a... View Article