JEE MAINS 2018 Prove that : `cos^2alpha+cos^2(alpha+beta)-2cosalphacosbetacos(alpha+beta)=sin^2b...
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JEE MAINS 2018 Prove that : `cos^2alpha+cos^2(alpha+beta)-2…
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The expression `cos^2(alpha+beta)+cos^2(alpha-beta)-cos2alphacos2beta` is
1:34
The expression `cos^2(alpha+beta)+cos^2(alpha-b…
263 viewsOct 12, 2018
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If `cos alpha+cos beta=0=sin alpha+sin beta,` then prove that `cos 2 alpha +cos 2 beta =-2 cos
2:46
If `cos alpha+cos beta=0=sin alpha+sin beta,` then prove that `c…
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`cos^(2) alpha +cos^(2) beta +cos^(2) gamma ` is equal to
1:27
`cos^(2) alpha +cos^(2) beta +cos^(2) gamma ` is equal to
7.9K viewsMay 24, 2020
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If `alpha and beta` are positive. acute angles and `cos 2alpha=(ncos 2 beta-1)/(n-cos2 beta
3:52
If `alpha and beta` are positive. acute angles and `cos 2alpha=(nc…
591 viewsOct 13, 2018
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if `cosalpha=3/5` and `cosbeta=4/5` find the value of `cos((alpha-beta)/2)`
3:19
if `cosalpha=3/5` and `cosbeta=4/5` find the value of `cos((alpha-beta)/…
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If `alpha, beta, gamma` are direction angles of a line l, then prove that `cos^(2)alpha+cos
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If `alpha, beta, gamma` are direction angles of a line l, then prove that `…
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2:15
If `alpha,beta ,gamma` are direction angles of a line , then `cos 2alpha …
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5:14
Prove that `2 sin^2 beta + 4 cos(alpha + beta) sin alpha sin bet…
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यदि एक सदिश veca की दिक् कोज्याएँ cos alpha, cos beta, …
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2:19
lf `cos^2 alpha -sin^2 alpha = tan^2 alpha`, then show that `tan^2 alph…
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If `cos alpha=(2cos beta-1)/(2-cos beta)` then `tan (alpha/2)*cot (beta/…
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3:01
If `cos alpha, cos beta, cos gamma` are the direction cosine of a line, t…
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1:36
If : `cos^(2)theta-sin^(2)theta=tan^(2)alpha and cos…
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A line makes angles `alpha,beta,gammaa n ddelta`\nwit…
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11:38
If `beta` is such that `sin beta !=0` then show that `(x^2+2xcos2alpha…
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If `2cosbeta=co(2alpha+beta)` then `3tan(alpha-beta)+cosalpha` is ind…
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7:46
यदि cos(theta - alpha) = a, sin (theta - beta) = b हो , तो cos^2 (alpha …
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2:55
If `tan^2alpha=1+2tan^2beta`, prove that, `cos 2 beta=1+2 cos 2 alpha`.
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6:24
यदि cos alpha+cos beta=sin alpha +sin beta=0, तो cos 2alpha+cos b…
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5:52
If `sinalpha+sin beta=a and cos alpha+cos beta=b,then sin(alpha+…
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4:27
Consider the following relations among the angles alpha,beta and …
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8:12
A line makes angles `alpha,beta,gamma`and `delta`wit…
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If a line makes angles `alpha, beta, gamma, delta` with the diafonals o…
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if cos alpha + cosbeta+cosgamma=0=sinalpha+…
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3:10
If `sin alpha + sin beta = a and cos alpha + cos beta =b`, show that `si…
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If `tanalpha=kcotbeta`, then `(cos(alpha-beta))/(cos(alpha+beta…
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If `sin alpha+ sin beta =2` then find the value of `cos^2alpha+cos^2 b…
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If `tanalpha=kcotbeta` then `cos(alpha-beta)/cos(alpha+beta)` is
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साबित करें कि `tan^(2) alpha-tan^(2) beta= ( sin ( alpha+beta) si…
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