Lines `L_1` and `L_2` have slopes m and n, respectively, suppose `L_1` makes twice as large angle with the horizontal (mesured counter clockwise from

Question

Lines `L_1` and `L_2` have slopes m and n, respectively, suppose `L_1` makes twice as large angle with the horizontal (mesured counter clockwise from

Lines `L_1` and `L_2` have slopes m and n, respectively, suppose `L_1` makes twice as large angle with the horizontal (mesured counter clockwise from the positive x-axis as does `L_2` and `L_1` has 4 times the slope of `L_2`. If `L_1` is not horizontal, then the value of the proudct mn equals.

Monjur Alahi

5 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Correct Answer - 2
Let `m=tan2theta` and `n=tantheta`
And `m=4n`
and `mne0`.
`therforetan 2theta ne 0`
`therefore thetane0`
`tan 2theta =4tan theta`
`rArr(2tantheta)/(1-tan^2theta)=4tantheta`
`rArr2 tan ^2theta =1`
`rArrtan^2theta=1//2`
`rArrmn=tan2theta.tantheta`
`=(2tan^2theta)/(1-tan^2theta)=(1)/(1-(//2))=2`

5 views Answered 2023-02-05 15:29