Answer:
what subject is it
Step-by-step explanation:
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Answer:
(1- cose0)(1 + cose0) = 0
(1-sin0)(1+sin0) = 1
Step-by-step explanation:
(1- cose0)(1 + cose0) = 0
1st Simplify: \left(1-cos(0))(1+cos(0))
2nd Use the following trivial identity: (0\right)=1
=(1-1)(1+1)
3rd Simplify:(1- cose0)(1 + cose0) = 0
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(1-sin0)(1+sin0) = 1
1st Use the following trivial identity: sin(0)=0
(1 - 0) (1 + 0)
2nd Simplify: (1-sin0)(1+sin0) = 1
X2=x2+2x+9
x2-x2=2x+9
2x+9=0
2x=-9
x=-9/2
