Raymond B. answered • 04/04/22
Tutor
5
(2)
Math, microeconomics or criminal justice
sin(x+y) = sinxcosy + sinycosx
if x=y
it simplifies to sin(2x) = 2sinxcosx
if x=y=45 degrees
sin(90) = 2sin45cos45
1 = 2(sqr2/2)(sqr2/2) = 2(2/4 = 1
if x=30, y=60
sin(90 = sin30cos60 + sin60cos30
1 = (1/2)(1/2) + (sqr3/2)(sqr3/2)
= 1/4 +3/4 = 1
