Question

guyz..can someome plz explain..​

Answer 1

ʜᴇʏᴀ ᴍᴀᴛᴇ ʜᴇʀᴇ ɪs ʏᴏᴜʀ ᴀɴsᴡᴇʀ 
.
.
●1/2 means sin 30

so, A-B =30

●also 1/2 = cos 60

So, A+B=60

Answer 2

step by step explanation

since cos(a+b)= 1/2

we know that cos60°= 1/2

by this we can say that,
a+b=60

similarly, for sin(a-b)=1/2

we know that sin30°=1/2

hence we can write that,
a-b=30

hope it helped you
if you liked it than please mark as brainlist answer