# Pre-Calc

posted by
**John** on
.

Evaluate the expression without using a calculator(show work please)?

(sin pi/4 cos pi/6 - sin pi/6 cos pi/4)

the answer is 1/4(2-ã3)

posted by
**John** on
.

Evaluate the expression without using a calculator(show work please)?

(sin pi/4 cos pi/6 - sin pi/6 cos pi/4)

the answer is 1/4(2-ã3)