Question

What is m∠A to the nearest degree?

Answer 1

48°

42°

36°

54°

Answer 2

Use the Sine Law.

\[\huge\color{blue}{ \frac{SinB}{b} =\frac{SinA}{a} } \]

plug in numbers,
\[\huge\color{blue}{ \frac{Sin(90°)}{75} =\frac{SinA}{56} ~~~~~~~~~->~~~ } \]\[\huge\color{blue}{ Sin(90°) \times 56 \div 75=SinA } \]

can you do it from here?

Answer 3

You don't know what "Sine Law" is?

Answer 4

Ok, lets do this,

\[\huge\color{red}{ Sine=\frac{opposite}{hypotenuse} } \]
( SOHCAHTOA )

\[\huge\color{blue}{ Cos~A =\frac{56}{75} } \]