Step-by-step explanation:
there are two ways you can answer this question . the first is you can use tan inverse or calculate the value of hypotenuse using Pythagorean thereom and use sin inverse
1 a*a + b*b = c*c. Pythagorean theroem
2. 6*6 +3*3 = c*c
36+9= c*c
√45 =c or. 3√5 ( when simplified)
sin <R =OPPOSITE
HYPOTENUSE
sin <R = 6/3√5
sin <R= 0.89
<R= sin-1(0.89)
<R= 63°
