Answer:
total ground and wall angle is 90°
beam angle with ground= 51
beam angle with wall =39
because total angle=angle with ground + angle with wall
angle with wall=total angle-angle with ground
angle with wall= 90-51=39
Do you mean add are subtract
i will glad to help in comments
if you awnser
Answer:
1
Step-by-step explanation:
if there is just k, the number behind it is always 1
Answer:
3 and 4
Step-by-step explanation:
