Problems
Problem :
Express the following as a product:
sin(100) - sin(60)
.
sin(100) - sin(60) = 2 cos(
(100 + 60))sin(
(100 - 60)) = 2 cos(80)sin(20)
.
Problem :
Express the following as a product:
cos(35) + cos(10)
.
cos(35) + cos(10) = 2 cos(
(35 + 10))cos(
(35 - 10)) = 2 cos(22.5)cos(12.5)
.