JEE MAINS 2018 Prove that : `cos^2alpha+cos^2(alpha+beta)-2cosalphacosbetacos(alpha+beta)=sin^2b...
2:43
JEE MAINS 2018 Prove that : `cos^2alpha+cos^2(alpha+beta)-2cosalphacosbetacos(alpha+beta)=sin^2b...
897 viewsOct 11, 2018
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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-beta)-cos2alphacos2beta` is
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 `cos 2 alpha +cos 2 beta =-2 cos
4K viewsOct 13, 2018
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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=(ncos 2 beta-1)/(n-cos2 beta
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)/2)`
2.7K viewsOct 12, 2018
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If `alpha, beta, gamma` are direction angles of a line l, then prove that `cos^(2)alpha+cos
4:31
If `alpha, beta, gamma` are direction angles of a line l, then prove that `cos^(2)alpha+cos
1.4K viewsMar 29, 2020
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2:15
If `alpha,beta ,gamma` are direction angles of a line , then `cos 2alpha + cos 2beta + cos 2 gamma =
6K viewsMay 24, 2020
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5:14
Prove that `2 sin^2 beta + 4 cos(alpha + beta) sin alpha sin beta + cos 2(alpha + beta) = cos
5.7K viewsOct 13, 2018
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2:32
यदि एक सदिश veca की दिक् कोज्याएँ cos alpha, cos beta, cosgammaहैं, तो cos 2alpha+ cos2 beta+cos...
4 viewsFeb 5, 2022
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2:19
lf `cos^2 alpha -sin^2 alpha = tan^2 alpha`, then show that `tan^2 alpha = cos^2 beta-sin^2 b...
3.2K viewsOct 12, 2018
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5:05
If `cos alpha=(2cos beta-1)/(2-cos beta)` then `tan (alpha/2)*cot (beta/2)` has the equal to [w...
5.4K viewsOct 12, 2018
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3:01
If `cos alpha, cos beta, cos gamma` are the direction cosine of a line, then find the value of
3.5K viewsOct 13, 2018
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1:36
If : `cos^(2)theta-sin^(2)theta=tan^(2)alpha and costheta*cosalpha=cosbeta, "then" : beta=`
425 viewsMay 24, 2020
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2:09
A line makes angles `alpha,beta,gammaa n ddelta`\nwith the diagonals of a cube. Show that `cos^2alpha
4.9K viewsMay 4, 2018
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11:38
If `beta` is such that `sin beta !=0` then show that `(x^2+2xcos2alpha+1)/(x^2+2xcos2beta+1) x...
30 viewsOct 12, 2018
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2:42
If `2cosbeta=co(2alpha+beta)` then `3tan(alpha-beta)+cosalpha` is independent of
14 viewsOct 13, 2018
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7:46
यदि cos(theta - alpha) = a, sin (theta - beta) = b हो , तो cos^2 (alpha - beta) + 2absin (alph...
127 viewsJan 4, 2023
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2:55
If `tan^2alpha=1+2tan^2beta`, prove that, `cos 2 beta=1+2 cos 2 alpha`.
4.4K viewsOct 13, 2018
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6:24
यदि cos alpha+cos beta=sin alpha +sin beta=0, तो cos 2alpha+cos beta= | 11 | त्रिकोणमितीय फलन |...
31 viewsJul 24, 2023
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5:52
If `sinalpha+sin beta=a and cos alpha+cos beta=b,then sin(alpha+beta)=`
2.7K viewsMay 24, 2020
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4:27
Consider the following relations among the angles alpha,beta and gamma made by a vector with the...
7 viewsNov 2, 2021
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8:12
A line makes angles `alpha,beta,gamma`and `delta`with the diagonals of a cube, prove that
137 viewsDec 27, 2019
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9:55
If a line makes angles `alpha, beta, gamma, delta` with the diafonals of a cubes
61 viewsMar 29, 2020
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12:39
if cos alpha + cosbeta+cosgamma=0=sinalpha+sinbeta+singamma then cos^2alpha+cos^2beta+cos^2gamma=3/2
11.3K viewsMar 10, 2023
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3:10
If `sin alpha + sin beta = a and cos alpha + cos beta =b`, show that `sin(alpha+beta)=(2ab)/(...
29.8K viewsOct 12, 2018
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2:50
If `tanalpha=kcotbeta`, then `(cos(alpha-beta))/(cos(alpha+beta))` is equal to
95 viewsMay 17, 2020
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1:22
If `sin alpha+ sin beta =2` then find the value of `cos^2alpha+cos^2 beta`
2.3K viewsSep 14, 2017
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1:52
If `tanalpha=kcotbeta` then `cos(alpha-beta)/cos(alpha+beta)` is
260 viewsSep 14, 2017
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3:47
साबित करें कि `tan^(2) alpha-tan^(2) beta= ( sin ( alpha+beta) sin( alpha-beta))/(cos^(2) alpha cos
271 viewsMar 29, 2020
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