Question

Please help! Find the value of sin72degrees cos12degrees-cos72degrees sin12degrees.
The second step is equal to
a. cos(72° + 12°)
b. cos(72° - 12°)
c. sin(72° - 12°)
d. sin(72° + 12°)

Answer 1

this is in the form of

sin(A - B) = sinAcosB - cosA sinB

do let A = 72 and B = 12

Answer 2

then it should br easy from there

Answer 3

sin(72-12)! Thanks!