Question

sin12sin48sin54=1/8​

Answer 1

Answer:

Step-by-step explanation:

sin12sin48sin54

= (1/2)2sin12sin48sin54

= (1/2)[cos36 -- cos60]sin54

= (1/2)[cos36 -- 1/2]cos36

= (1/32)[√(5) + 1 -- 2][√(5) + 1]

= (1/32)(5 -- 1)

= 1/8