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secondary 4 | E Maths
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Date Posted: 5 years ago
Views: 248
you started off correctly.
I'm denoting the square of a quantity as sq.
26 sq = 9x sq + x sq - 6x sq cos(120)
cos 120 = -1/2 so
26 sq = 10x sq + 3x sq
26 sq = 13x sq
x = 2 sqrt(13)
I'm denoting the square of a quantity as sq.
26 sq = 9x sq + x sq - 6x sq cos(120)
cos 120 = -1/2 so
26 sq = 10x sq + 3x sq
26 sq = 13x sq
x = 2 sqrt(13)
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