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Derive a formula for the angle between t...

Derive a formula for the angle between two lines with slopes `m_(1) and m_(2)`. Hence the slopes of the lines which make an angle `pi/4` with the line `x-2y+5=0`

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OSWAAL PUBLICATION-SAMPLE PAPER 1-EXERCISE
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  11. A group consists of 4 girls and 7 boys. In how many ways can a team of...

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  12. State and prove Binomial theorem for a positive integer index.

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  18. (b)Find the sum of first n terns of the series 1^2+2^2+……+n^2.

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