Question

Use a sum or difference formula to find exact value of the following:

sin5π/4 cos11π/12 - cos5π/4 sin11π/12 =

Answer 1

\(\bf \color{blue}{\text{Use a sum or difference formula}} \text{ to find exact }\\\\
\text{value of the following:}\)

Answer 2

IF YOU observe carefully you can say A=5pi/4 and B=11pi/12
so you can use SIN (A-B)

Answer 3

so.... use them then :)

Answer 4

given enough hints now just carry out basic work
sin (a-b)= sin a cos b - sin b cos a

Answer 5

thank you!