(cos(x) + cos(y))^2 + (sin(x) - sin(y))^2 Remove the brackets
cos^2(x) + cos^2(y) + 2cos(x)*cos(y) + sin^2(x) - 2(sin(x)*sin(y) + sin^2(y) Combine these two in bold to make 1 because sin^2(x) + cos^2(x) = 1
1 + cos^2(y) + 2cos(x)*cos(y) - 2*sin(x)*cos(y) + sin^2(y)
These two in bold also make 1
2 + 2cos(x)*cos(y) - 2*sin(X)*sin(y) Bring out a common factor of 2
2 +2(cos(x)*cos(y) - sin(x)*sin(y) )
but cos(x+y ) = cos(x)*cos(y) - sin(x)*sin(y)
2 + 2* cos(x + y) is your final answer.
Elimination is the right answer
Answer:
1 ???????
Step-by-step explanation:
Interept!
in the formula y=mx+b, the m=slope, and the b=the intercept
hope this helps!
Answer:
a) $(
)
b) $(20m + 7080 - 43200/m)
d) m= 36 or m= -60
e) $200
Step-by-step explanation:
Please see the attached pictures for full solution.
