Question

Find the value of x and y.

Answer 1

@campbell_st

Answer 2

you should really watch some khanacademy.org videos so you understand the material

Answer 3

well i dont have time for that

Answer 4

I'd find h as my 1st step using the left hand right triangle... angle 45 and hypotenuse 8.



then when you have h look at the right hand right triangle and you can find both x and y using trig ratios.

Answer 5

@Mariam.A can u help on this one?

Answer 6

u there ??

Answer 7

yeah

Answer 8

ok do you know the sine rule????

Answer 9

no

Answer 10

can u make this quick, i need to go..

Answer 11

ok sine rule states \[\frac{ a }{ sinA }=\frac{ b }{ sinb }\]

Answer 12

so looking at the little triangle with side 8
if a=8 and sinA is its opposite angle sinA=sin90
and b=h like campbell labelled and its opposite angle sinB=sin45

Answer 13

\[\frac{ 8 }{ \sin90 }=\frac{ h }{ \sin45 }\]

Answer 14

ok so what next..

Answer 15

solve for h

Answer 16

do we multiply

Answer 17

you can solve for h by cross multiplying

Answer 18

90h/360