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have you studied Pythagoras theorem

no not yet

ok you want to solve this using sin and cos

you should have done it right?

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

you can use the sin rule or the cos rule

ok

how which side to square

i meant what side do we square

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

then i can understand it better

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

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

right

do you agree with that rule

yes i understand now

the guy says he hasn't done Pythagoras theorem

so we had to go to a different ulternative

ok