Question

solve this...step by step...​

Answer 1

Answer:

2cos^2@+3sin@=0

2(1-sin^2@)+3sin@=0

2-sin^2@+sin@=0

sin^2@-sin@-2=0

sin^2@-2sin@+sin@-2=0

sin@(sin@-2)+1(sin@-2)=0

(sin@-2)(sin@+1)=0

sin@=2 or sin@=-1

but sin@≠2

sin@=-1

hope it helps you!!