What is sin 120 degrees? - Socratic
May 30, 2015 · On the trig unit circle: sin 120 = sin (180 - 60) = sin 60 = sqrt3/2
Double Angle Identities - Trigonometry - Socratic
Explanation: Following table gives the double angle identities which can be used while solving the equations. You can also have #sin 2theta, cos 2theta# expressed in terms of #tan theta # as under. #sin 2theta = (2tan theta) / (1 + tan^2 theta)#. #cos 2theta = (1 - tan^2 theta) / (1 + tan^2 theta)#. sankarankalyanam · 1 · Mar 9 2018.
Trigonometric Functions of Any Angle - Trigonometry - Socratic
How do you find the trigonometric functions of any angle? Well, I guess you could use a special representation of the function through a sum of terms, also known as Taylor Series. It is, basically, what happens in your pocket calculator when you evaluate, for example, #sin (30°)#. Your calculator does this: #sin (theta)=theta-theta^3/ (3 ...
Amplitude, Period and Frequency - Trigonometry - Socratic
Frequency and period are related inversely. A period P is related to the frequency f. P = 1/f. Something that repeats once per second has a period of 1 s. It also have a frequency of 1/s. One cycle per second is given a special name Hertz (Hz). You may also say that it has a frequency of 1 Hz. A sin function repeats regularly.
How do you find the 6 trig functions of 120 degrees? - Socratic
Jul 10, 2015 · sin120=sqrt(3)/2 cos120=-1/2 tan120=-sqrt(3) ctg120=-sqrt(3)/3 sec120=-2 csec120=(2sqrt(3))/3 To calculate sin120 and cos120 you can use the reduction formula, which says, that sin(180-x)=sinx and cos(180-x)=-cosx Rest of the functions can be calculated as: tanx=sinx/cosx ctgx=1/tanx secx=1/cosx csecx=1/sinx
How do you evaluate Sin 120? - Socratic
Jun 26, 2016 · We have that sin(120)=sin(2*60)=2sin60*cos60=2*sqrt3/2*1/2=sqrt3/2 Also sin(120)=sin(180-60)=sin60=sqrt3/2
Sum and Difference Identities - Trigonometry - Socratic
How do you apply the sum and difference formula to solve trigonometric equations? Main Sum and Differences Trigonometric Identities. #cos (a - b) = cos a*cos b + sin a*sin b#. #cos (a + b) = cos a*cos b - sin a*sin b#. #sin (a - b) = sin a*cos b - sin b*cos a#. #sin (a + b) = sin a*cos b + sin b*cos a#. #tan (a - b) = (tan a - tan b)/(1 + tan a ...
How do you find the value of cos 120? - Socratic
Dec 25, 2016 · How do you find the value of #cos 120#? Trigonometry Trigonometric Identities and Equations Double Angle Identities. 1 Answer
What is the period and amplitude for #I(t) =120 sin (10pix - Socratic
Jun 5, 2015 · A general time-dependent wave function can be represented in the following form: y = A*sin(kx-omegat) where, A is amplitude omega = (2pi)/T where T is time period k = (2pi)/lamda where lamda is the wavelength So, comparing with the given equation I(t) =120 sin (10pix - pi/4), we can find: Amplitude (A) = 120 Now, your supplied equation has no t- dependent parameter …
How do you evaluate the sine, cosine, and tangent of the
Jul 19, 2015 · Find 3 trig functions of arc 225 deg Answers: sin = cos = -(sqrt22)/2 , tan = 1