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In order to do that, and this only works for right angled triangles, is using the sine, cosine, and tangent rules. An easy way to remember this is by using the acronym SOH, CAH, TOA that my teacher taught...
Work out how many miles Dan does in a week if he drove. 24.2 x 5 = 121Work out how many gallons of petrol this would be. 121/32.3 = 3.746130031Convert into litres. 3.746130031 x 4.5 = 16.85758514Work out ...
x2 + y2 = 25 ...
We multiply the 2x in the first bracket by everything in the second bracket to give: 2x2-2xWe then multiply the 3 in the first bracket by everything in the second bracket to give: 3x-3Putting 2...
Equation: x2 +4x-5=0 (This is in the form ax2+2bx+c=0)First divide 2b by 2 (4/2=2)Then put this into (x+b)2-(b)2+c=0This gives: (x+2)2-(2)2GJAnswered by George J. • Maths tutor2530 Views
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