" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
= 4(2cos45 sin15)
= 4 ( sin(45+15) - sin(45-15) )
= 4 (sin60 - sin30)
= 4 (1/2 akar 3 - 1/2)
= 2 akar3 - 2