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os x)2 = 1+ 2 sin x cos x   1- 2 cos x - 3cos2 x = 1- 3cos x

os x)2 = 1+ 2 sin x cos x   1- 2 cos x - 3cos2 x = 1- 3cos x

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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  1. Two trigonometric identities are given by:
    1. (sin x + cos x)2 = 1+ 2 sin x cos x

 

1- 2 cos x - 3cos2 x = 1- 3cos x

                  

 

  1.  

 

sin2 x

 

1- cos x

 

For each part, verify that the identity is correct by calculating the values of the left and right sides of the equation using MATLAT, substituting x=200

 

 

  1. Find the solution to the systems

+  =
 

...            ..                         .

y + 3 y + 2 y   y u

Where y (0) =0; y’ (0) =0. u (t) is a square wave.

Expert Solution
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Q.

  1. Two trigonometric identities are given by:
    1. (sin x + cos x)2 = 1+ 2 sin x cos x

 

1- 2 cos x - 3cos2 x = 1- 3cos x

                  

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