Answer / bob

sine and cosine are interchangeable we all know that
sin(wt-90)=coswt
it means that if we shift sine wave phase of sine wave by
90 degree we will get cosine wave

Answer / r c ,rit

According to me both of them are some what same ,no need to
distinguish them. coasine is a sine wave with a phase
shift , so according to the reference change same wave is
getting different names. So i think no special use in
doing so...

Answer / raviteja nowduru

the basic difference between sine and cosine is just 90
degrees phase shift.the fourier transform of sine is cosine
and vice versa.it is easy produce sine wave compared to
other alternating quanitities.that is the reason y all
generators produce sine although they can produce other
altering quantities

Answer / naresh

alternating current can be both of sinusoidal and of cosine
form .
so any wave form can be applicable
cosine wave can be produced by shifting phase angle of the
sine wave by 90 degrees.

why we use ac as a electric appliance in home or daily use?

1 Answers   MNC,

---

why there is a fault occurs, if a phase wire touches ground.. and the fault not occurs when we connect a bulb between phase and ground..??

1 Answers  

---

What is difference between ct&pt transformers?

4 Answers   Adgas,

---

how to select diiferent power transformers of same capacity on no load loss and full load loss by economical point of view.?

0 Answers  

---

List the advantages of star-delta starter with induction motor?

0 Answers  

---

what will be the energy loss =? Voltage drop = ? Conductor resistance at 20 degree C = ? Temprature convertion Factor at 50 degree c = ? on ACSR DOG Condutor at following data. distance = 4.8 kM Load = 2980 kWh Size of Conductor = 6/ 0.186 Volt = 11 kV.

1 Answers   Pakistan Atomic Energy Commission PAEC,

---

how to calculate current when LT supply 415v fed to HT Motor 6.6kv and 1120kw.

2 Answers  

---

Define corner frequency?

0 Answers  

---

What is the effect of impedance on the heat losses in case of AC system??? Does heat losses really depends on the impedance or depends only on resistive component only..??

4 Answers  

---

How to select busbar?

2 Answers  

---

234 MVA Generator 3 phase Short circuit current Values required? Gen set Rating-234 MVA, Gen Voltage-18kv, PF;0.8, Xdv:23.5 %, Transformer Rating-18/380KV, 680MVA,Yndd1 two winding, Step up TR, ZT:35.50 %,X/R 4.33 Gen CB Position, CB open ,Disconnected open, Generator Running Voltage 18 Kv, Bi mistakes generator side earth switch Closed during that time short circuit current level in 3 Phase required, and how to test on site 234MVA Generator Short circuit current,

0 Answers   Jubail O&M,

---

purpose of flux relay for turbo generator in power plant

1 Answers  

---