please answer the question
Answers
angle,...120 degree.....
Answer:
Hiii,
so, we can write the formula as
2acos theta /2
----------------------------------------------------------
now, if theta =0 ,than
2acos0/2
=2acos 0°
=2a
because cos0°=1
-----------------------------------------------------------
if theta =60°
2acos60/2
=2acos30°
=2a×√3/2
=√3a
----------------------------------------------------------
if theta=90°
2acos90/2
=2acos45°
=2a×1/√2
=√2a
---------------------------------------------------------
if theta=120
2acos120/2
=2acos60°
=2a×1/2
=a.
-----------------------------------------------------------------
if theta= 180
=2acos180/2
=2acos90°
= 0
because cos90°= 0& if we multiply any number by 0 than the result will be 0
#Hope it will help you
#mark me brainliest