Here is the anwer to your question ,
n+4•5
Let
be the length of a leg. Using the pythagorean theorem, the hypotenuse is

So, the hypotenuse is
times as long as either leg.
Using sin(A+B) = sinAcosB + cosAsinB
sin20cos40 + cos20sin40 = sin(20+40) = sin60degree
=
Hi
345 in standard form is : 3.45²
27 in standard form is : 2.7*10
I hope that's help !