Question

find value of cos2 thita if 2 sin 20=root 3​

Answer 1

Answer:

2sin 2o=root 3

so we can write it as

sin2o= root3/2

so

sin2o=sin60degree

because the value of root3/2 is sin 60degrees

sin got cancelled on both sides so now

2o=60degrees

so

o=60/2

o=30degrees