Using Properties of Determinants, Prove That|(Sin Alpha, Cos Alpha, Cos(Alpha+ Delta)),(Sin Beta, Cos Beta, Cos (Beta + Delta)),(Sin Gamma, Cos Gamma, Cos (Gamma+ Delta))| = 0 - Mathematics | Shaalaa.com
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CBSE Class 11-science Answered
SOLVED: Find the exact value of the expression cos(alpha+Beta),sin(alpha+Beta), and tan(Alpha+Beta) under the following conditions: cos(alpha)=21/29 , lies in quadrant IV, and sin(beta)=-2/5 , lies in quadrant III.
![sinalpha + sin (alpha + beta ) + sin (alpha + 2beta)...sin(alpha + (n - 1)beta ) = sinnbeta/2sinbeta/2 [ alpha + (n - 1) beta2 ]](https://haygot.s3.amazonaws.com/questions/1992942_693169_ans_02639ea0ee5e45f5ba0bb8f2a9daa10a.jpg "sinalpha + sin (alpha + beta ) + sin (alpha + 2beta)...sin(alpha + (n - 1)beta ) = sinnbeta/2sinbeta/2 [ alpha + (n - 1) beta2 ]")
sinalpha + sin (alpha + beta ) + sin (alpha + 2beta)...sin(alpha + (n - 1)beta ) = sinnbeta/2sinbeta/2 [ alpha + (n - 1) beta2 ]
if `tan alpha = 2tanbeta` show that `(sin(alpha+beta))/(sin(alpha-beta)) = 3` - YouTube
![If a = [(Sin Alpha, Cos Alpha),(-cos Alpha, Sin Alpha)] Then Verify That A'A = I - Mathematics | Shaalaa.com](https://www.shaalaa.com/images/_4:224fcb85876c471889528b2b269be222.png "If a = [(Sin Alpha, Cos Alpha),(-cos Alpha, Sin Alpha)] Then Verify That A'A = I - Mathematics | Shaalaa.com")
If a = [(Sin Alpha, Cos Alpha),(-cos Alpha, Sin Alpha)] Then Verify That A'A = I - Mathematics | Shaalaa.com
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sinalpha+sinbeta-sin(alpha+beta))/(sinalpha+sinbeta+sin(alpha+beta))=tan( alpha/2)tan(beta/2)
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36. If sin alpha + sin beta is equal to a and cos alpha + cos beta is equal to b then find value of cos alpha + beta and sin alpha + beta
