Show that the equation is not an identity by finding a value of x for which both sides are defined but not equal.
-The sound produced by touching each button on a touch-tone phone is described by $y = \sin 2 \pi l t + \sin 2 \pi h t$
where $l$ and h are the low and high frequencies (cycles per second) in the figure shown.

Use a calculator to find the graph of the sound emitted by touching the 3 key in a $[ 0,0.01,0.001 ]$ by $[ - 2,2$, 1] viewing rectangle.

Question

Show that the equation is not an identity by finding a value of x for which both sides are defined but not equal.
-The sound produced by touching each button on a touch-tone phone is described by $y = \sin 2 \pi l t + \sin 2 \pi h t$
where $l$ and h are the low and high frequencies (cycles per second) in the figure shown.

Use a calculator to find the graph of the sound emitted by touching the 3 key in a $[ 0,0.01,0.001 ]$ by $[ - 2,2$, 1] viewing rectangle.

Quizplus · Accepted Answer

The Answer of Show that the equation is not an identity by finding a value of x for which both sides are defined but not equal.
-The sound produced by touching each button on a touch-tone phone is described by $y = \sin 2 \pi l t + \sin 2 \pi h t$
where $l$ and h are the low and high frequencies (cycles per second) in the figure shown.

Use a calculator to find the graph of the sound emitted by touching the 3 key in a $[ 0,0.01,0.001 ]$ by $[ - 2,2$, 1] viewing rectangle.

Show That the Equation Is Not an Identity by Finding y=sin⁡2πlt+sin⁡2πhty = \sin 2 \pi l t + \sin 2 \pi h ty=sin2πlt+sin2πht

Show That the Equation Is Not an Identity by Finding $y = \sin 2 \pi l t + \sin 2 \pi h t$