How Do You Remove Ripples From Dc By using larger input capacitors, ripples can be removed from DC input. To know in detail about dc motor, visit BYJU’S.... View Article
What Is The Difference Between Rc And Lc Filters Difference between RC and LC filters RC Filter LC Filter It is used for small load currents. It is used for heavy... View Article
Which Application Uses Differentiator A differentiator is used in electronic analogue computers, frequency modulators and analogue PID controllers. To know in detail about various... View Article
If Sec Theta 1 1 4 Then Tan Theta 2 Equals To 1) 1/3 2) 3/4 3) 1/4 4) 5/4 Answer: (1) 1/3 Solution: Given, sec θ = 1 1/4 = 5/4 cos θ = 1/sec θ = 4/5 We know that cos 2A = (1... View Article
If Cos Theta 3 5 And Cos Phi 4 5 Where Theta And Phi Are Positive Acute 1) 7/√2 2) 7/5√2 3) 7/√5 4) 7/2√5 Answer: (2) 7/5√2 Solution: Given, cos θ = 3/5 and cos Φ = 4/5, where θ and Φ are positive acute... View Article
Cot Square 15 Minus 1 Cot Square 15 Plus 1 1) 1/2 2) √3/2 3) 3√3/4 4) √3 Answer: (2) √3/2 Solution: (cot215° - 1)/(cot215° + 1) = [(1/tan215°) - 1]/ [(1/tan215°) + 1] = (1... View Article
Cos Pi 11 Plus Cos 3pi 11 Plus Cos 5pi 11 Cos 7pi 11 1) -1/2 2) 1/2 3) 1 4) -1 Answer: (2) 1/2 Solution: cos π/11 + cos 3π/11 + cos 5π/11 + cos 7π/11 + cos 9π/11 Multiplying and... View Article
The Value Of Tan 40 Plus Tan 20 Plus Root3 Tan 20 Tan 40 Is 1) √12 2) 1/√3 3) 1 4) √3/2 5) √3 Answer: (5) √3 Solution: 60° = 40° + 20° Taking “tan” on both sides, tan 60° = tan(40° +... View Article
If 8 Cos 2theta Plus 8 Sec 2theta 65 0 Theta Pi 2 Then 1) -33/8 2) -31/8 3) -31/32 4) -33/32 Answer: (2) -31/8 Solution: 8 cos 2θ + 8 sec 2θ = 65, 0 < θ < π/2 8 cos 2θ + (8/cos... View Article
The Value Of 1 8 Of 3 4 Cos 2theta Cos 4theta Is 1) cos 4θ 2) sin 4θ 3) sin4θ 4) cos4θ 5) sin 4(θ/2) Answer: (3) sin4θ Solution: (1/8) (3 - 4 cos 2θ + cos 4θ) Using the formula... View Article
If Alpha Beta Are Solutions Of 6 Cos Theta Plus 8 Sin Theta 9 Then 1) 3/5 2) 4/5 3) 24/25 4) 12/13 Answer: (3) 24/25 Solution: Given, 6 cos θ + 8 sin θ = 9 2(3 cos θ + 4 sin θ) = 9 3 cos θ + 4... View Article
Cos Alpha Sin Beta Minus Gamma Plus Cos Beta Gamma Minus Alpha 1) 0 2) 1/2 3) 1 4) 4 cos α cos β cos γ Answer: (1) 0 Solution: cos α sin(β - γ) + cos β sin(γ - α) + cos γ sin(α - β) = cos α(sin... View Article
The Expression Cos 6x 6 Cos 4x 15 Cos 2x 10 Cos 5x 5 Cos 3x 10 Cos X 1) cos 2x 2) 2 cos x 3) cos2x 4) 1 + cos x Answer: (2) 2 cos x Solution: (cos 6x + 6 cos 4x + 15 cos 2x + 10)/(cos 5x + 5 cos 3x +... View Article
If Sin A Sin 2a X And Cos A Cos 2a Y Then X 2 Y 2 1) 2y 2) y 3) 3y 4) None of these Answer: (1) 2y Solution: Given, sin A + sin 2A = x cos A + cos 2A = y Now, x2 + y2 = (sin A +... View Article
Sin B Plus A Plus Cos B Minus A Sin B Minus A Cos B Plus A 1) (cos B + sin B)/(cos B - sin B) 2) (cos A + sin A)/(cos A - sin A) 3) (cos A - sin A)/(cos A + sin A) 4) None of these Answer: (2)... View Article
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 sin2x Solution: 2 cos x - cos 3x - cos... View Article
Cos Square Pi 6 Plus Theta Minus Sin Square Pi 6 Minus Theta 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 + θ) - sin2(π/6 - θ) Using the formula... View Article
Cos A Plus Cos 240 Plus A Plus Cos 240 Minus A 1) cos A 2) 0 3) √3 sin A 4) √3 cos A Answer: (2) 0 Solution: cos A + cos(240° + A) + cos(240° - A) Using the formula cos(A + B) +... View Article
The Value Of Sin 600 Cos 330 Cos 120 Sin 150 Is 1) -1 2) 1 3) 1/√2 4) √3/2 Answer: (1) -1 Solution: sin 600° cos 330° + cos 120° sin 150° = sin(360° + 240°) cos(360° - 30°) +... View Article
1 Plus Cos 2x Plus Cos 4x Plus Cos 6x Equals To 1) 2 cos x cos 2x cos 3x 2) 4 sin x cos 2x cos 3x 3) 4 cos x cos 2x cos 3x 4) None of these Answer: (3) 4 cos x cos 2x cos 3x... View Article