## dedderick Group Title In the triangle, x = 3. Find y. one year ago one year ago

1. dedderick Group Title

2. mathsmind Group Title

have you studied Pythagoras theorem

3. mathsmind Group Title

?

4. dedderick Group Title

no not yet

5. mathsmind Group Title

ok you want to solve this using sin and cos

6. mathsmind Group Title

you should have done it right?

7. itsmeeQUENNIE Group Title

@dedderick the formula for pythagoran theorem is |dw:1360070556954:dw|

8. mathsmind Group Title

you can use the sin rule or the cos rule

9. dedderick Group Title

ok

10. dedderick Group Title

how which side to square

11. dedderick Group Title

i meant what side do we square

12. mathsmind Group Title

i will give you the answer and then prove it for you

13. dedderick Group Title

then i can understand it better

14. mathsmind Group Title

if x =3 in your case then y=$3\sqrt{2}$

15. mathsmind Group Title

now you should know that $\sin 45 = \cos 45=\frac{ 1 }{ \sqrt{2} }$

16. dedderick Group Title

right

17. Nataliecowell Group Title

In any right triangle, you can use the Pythagorean Therom to solve for sides. In that triangle, x is 2 of the sides and equals 3. Pyhtagreons Therom is a^2+b^2=c^2 A and b are the x's in the diagram. So 3^2 + 3^2 is equal to 18= c^2 Then find the square root of 18 to solve.

18. mathsmind Group Title

do you agree with that rule

19. dedderick Group Title

yes i understand now

20. mathsmind Group Title

the guy says he hasn't done Pythagoras theorem

21. mathsmind Group Title

so we had to go to a different ulternative

22. dedderick Group Title

ok