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secondary 4 | A Maths
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hi can smn pls help me w (a) !!!
Date Posted: 4 years ago
Views: 276
draw a line from A that parallel to length L
let that line be QA
QA/4 = sin θ
QA = 4 sin θ
&
QA = L + a short length
let that short length be RA , where R is perpendicular below B and R is on line QA.
RA/2 = cos θ
RA = 2 cos θ
since
QA = L + RA
L = QA - RA = 4 sin θ - 2 cos θ
* if u understand the above ,
u can proceed with R-formula in part (ii)
.
let that line be QA
QA/4 = sin θ
QA = 4 sin θ
&
QA = L + a short length
let that short length be RA , where R is perpendicular below B and R is on line QA.
RA/2 = cos θ
RA = 2 cos θ
since
QA = L + RA
L = QA - RA = 4 sin θ - 2 cos θ
* if u understand the above ,
u can proceed with R-formula in part (ii)
.
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done
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Date Posted:
4 years ago
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