A(3,-1),B(2,3) and C(5,1) are given then...

`A(3,-1),B(2,3)` and `C(5,1)` are given then `m angleA` = ………

A

`cos^(-1)""(3)/(sqrt(34))`

B

`pi-cos^(-1)""(3)/(sqrt(34))`

C

`sin^(-1)""(5)/(sqrt(34))`

D

`(pi)/(2)`

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A

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If bar(x).bar(y)=bar(x).bar(z) ne 0 and bar(x)xx bar(y)=bar(x)xx bar(z...
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