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`2costheta=x+1/x`and `2cos phi=y+1/y` then (A)` x^n+1/(x^n)= 2 cos(n theta) n in Z` (B) `x/y+y/...
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+1/(x^my^n)= 2(cos mtheta +n phi), m,n in Z`
0:06:53
`2costheta=x+1/x`and `2cos phi=y+1/y` then (A)` x^n+1/(x^n)= 2 cos(n theta) n in Z` (B) `x/y+y/...
0:10:10
if 2costheta=x+1/x , 2cos fai=y+1/y,2cossai=z+1/z then 2cos(theta+fai+sai)=xyz+1/xyz
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If \( 2 \cos \theta=x+\frac{1}{x} \) and \( 2 \cos \varphi=y+\frac{...
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if x+1/x=2costheta then show that x^n+1/x^n =2cosntheta || CBCS,Maths(Hons) B.Sc 1st sem
0:06:58
If \( 2 \cos \theta=x+\frac{1}{x} \) and \( 2 \cos \phi=y+\frac{1}{...
0:04:32
If `2 costheta = x +1/x` and `2cosphi=y+1/y`, then
0:10:55
How To Find Powers of Complex Number By De-Moivre's Theorem (Part-II)
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12th maths exercise 2.8 question 4/if 2cos=x+1/x and 2cos=y+1/y show that x/y+y/x=2cos....
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If `2costheta=x+1/x`, then `2cos2theta=`?
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If `2 cos A=x+1/x, 2 cosB=y+1/y` then show that `2 cos(A-B)=x/y + y/x`.
0:05:50
If x+1/x=2 cos〖θ,〗 then x is equal to
0:01:49
If `x+1/x = 2cos theta`, then `x^3 + 1/x^3` is equal to
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If `(x+1/x)=2cos(pi/10)` ,then `x^5+1/(x^5)=?`
0:06:49
If `x+(1)/(x)=2costheta`, then `x^(n)+(1)/(x^(n))` is equal to
0:02:53
`x+1/x=2cosalpha` then `x^n+1/x^n=`
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If `x+1/x=2 cos theta`, then the value of `x^n+1/x^n`
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If x=ϕ-tanϕ and y=cosecϕ+ϕ, then (a) x=y+1/y-1 (b) x=y-1/y+1 (c) y=1+x/1-x (d) x y+x-y+1=0
0:04:24
If ` 2 cos alpha = x + 1/x , 2 cos beta = y + 1/ y , 2 cos gamma = z + 1/z` then `xyz + 1/(xyz)...
0:02:08
If for real values of x, `costheta=x+(1)/(x)`, then
0:06:51
If `x= 2costheta-cos 2theta` and `y=2 sintheta - sin 2theta`.Find `(d^2y)/(dx^2)` at `theta=p
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If `cos2x+2cosx=1` then `sin^2x(2-cos^2x)` is
0:03:54
If `x^2-2xcos theta+1=0`, then the value of `x^(2n)-2x^n cosntheta+1, n in N` is equal to
0:10:55
If x + 1/x = 2 cos theta , then find the value of x cube + 1/x cube || Trigonometry || CBSE part 3
0:05:15
prove that `(cos3theta+cos3phi)/(2cos(theta+phi)-1)`=`(costheta +cosphi)cos(theta+phi)-(sinthet...
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