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Q: What is the graph of f(t)(sin t cos t?
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Show that cos3t equals 4cos cubed t - 3cos t?

cos(3t) = cos(2t + t) = cos(2t)*cos(t) - sin(2t)*sin(t) = [cos2(t) - sin2(t)]*cos(t) - 2*cos(t)*sin(t)*sin(t) = [cos2(t) - sin2(t)]*cos(t) - 2*cos(t)*sin2(t) then, since sin2(t) = 1 - cos2(t) = [2*cos2(t) - 1]*cos(t) - 2*cos(t)*[1 - cos2(t)] = 2*cos3(t) - cos(t) - 2*cos(t) + 2*cos3(t) = 4*cos3(t) - 3*cos(t)


What is cos theta minus cos theta times sin squared theta?

cos(t) - cos(t)*sin2(t) = cos(t)*[1 - sin2(t)] But [1 - sin2(t)] = cos2(t) So, the expression = cos(t)*cos2(t) = cos3(t)


What is the Equation for a spiral graph?

See: http://www.mathematische-basteleien.de/spiral.htm r(t) = at x(t) = atcos(t) (a x t x cos(t)) y(t) = atsin(t) There are many kinds of spirals. See the article. Ray


What is sin regression.. is it when you change a cos graph into a sin graph by moving it sideways help?

no


Synchronization techniques in DSBSC system?

Case 1 -Frequency errorMultiplierMultiplierLow passfilterLow passfilter Message signalDSB-SCLocal oscillatorc(t)=Eccos([ct+([)Local oscillatorc(t)=Eccos([ct+([)Condition:Local oscillator has the samephasebutdifferentfrequencycompared to carrier signal at thetransmitter.[m2[c+[m2[c-[mLow pass filterhigh frequencyinformation)(cos]cos)([)([([[t t t mtycc)2(cos)(cos)()(cos)()2(cos)()(21212121[([[(![([([!t t t t t t tycc[(!cos)()(21t t v


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yes cos(x) makes a wave that starts on 0,1 you will have to graph it


What is the y intercept of the graph of y equals cos x?

1


How do you calculate velocity from an x-t graph?

If an x-t graph is a position-time graph, velocity is the slope of the line on the graph.


What is cosine 850?

Cos of 850 degrees?850 deg = 130 + 360*2 = 130 degBy the graph of the cosine: cos(130) = -cos(50)and cos(50) is not a fraction of a root.cos(50) = 0.6427876...Therefore, cos(850) = -0.6427876...


The graph of y equals arc cos 2x?

This site is not suitable for graphs.


How do you solve the equation negative 3 cos t equals 1 in the interval from 0 to 2 pi?

Isolate cos (t): cos(t)=1/3. Use a calculator from here because the answer is not an integer or a simple number.


The frequency of this signal is?

If you are given a graph of the signal. Calculate the period, T, which length of time for one cycle. The frequency is f = 1/T (Hz) For example. T = 20 ms, f = 1/(20 ms) = 50 Hz. If you are given an equation, in the form of: v(t) = Vm cos (ωt + ϴ) The frequency is ω (rad/s) For example v(t) = 120 V cos ((314 rad / s) t + 0) The frequency is 314 rad/s = 50 Hz.