CHAPTER 1 SIGNALS AND SYSTEMS EXERCISE E1.2 Redo Example 1.2a to find the power of a sinusoid C cos (wot + 0) by averaging the signal energy over one period To 2/wo (rather than averaging over the infinitely large interval). Show also that the power of a dc signal x(t) = Co is C, and its rms value is Co- = EXERCISE E1.3 == Show that if w₁ =w2, the power of x(t)=C₁ cos (w₁t +01)+C₂ cos (w₂t +62) is [C₁²+C₂²+ 2C1C2 cos (01-02)]/2, which is not equal to (C₁2+ C22)/2. OPERATIONS