Ứng dụng trong vật lý

= !e2X sin 3x + ~e2X cos 3x - if e2x cos 3x dx. 3. 9. 9. => (1 + ~) f e2x cos 3x dx = ~e2X sin 3x + ~e2X cos 3x f e2x. => e2x cos 3x dx = 13(3 sin 3x + 2 cos 3x) ... period y=sin(x)*cos(3x). Natural Language; Math Input. Have a question about using Wolfram|Alpha?Contact Pro Premium Expert Support ». ... cos(3x)°. What is the value of x? 1) 10. 2) 15. 3) 20. 4) 25. 19 If sin(2x + 7)° = cos(4x − 7)°, what is the value of x? 1) 7. 2) 15. 3) 21. 4) 30. 20 If sin(3x ... ... by substitution: (a). Z x3 p x2 +2dx. (b*). Z x2 cos (x3)dx. (c). Z 1 x2 sin. 1 x dx. (d). Z cos(3x − 7) dx. (e). Z e√ x. √ x dx. (f*). Z e(x+ex) dx (use u = ex). Jul 26, 2020 ... Comments Section ... Or using u = ei x = cos(x)+i*sin(x), you're expressing cos(3x) = (u3+1/u3)/2 in terms of powers of cos(x) = (u+1/u)/2, ... Jul 25, 2008 ... cos(x) + cos(3x). 32. + cos(5x). 52. +. 7x. 72 + ...) . Draw the concerning discrete amplitude spectrum in the given coordinate frame and ... Apr 21, 2017 ... cos(3x) in terms of cos(x), write cos(3x) in terms of cos(x), using the angle sum formula and the double angle formulas, ... (d) cos(3x)sin(3x)dx. ∫ . 5. Evaluate the integral. 0 exp(2sin )cos x x dx π. ∫ . 6. Evaluate cos(2 ) x x dx π π-. ∫. Apr 14, 2015 ... 7 cos(3x). 3. + C. (B). 2x. 3. 2. 3. + e4x −. 7 cos(3x). 3. + C. (C). 2x. 3. 2. 3. + e4x +. 7 cos(3x). 3. + C. (D). 2x. Apr 22, 2022 ... By clicking “Sign up”, you agree to our terms of service and acknowledge you have read our privacy policy. Sign up with Google. OR. Email.