Answer:
5/7
Step-by-step explanation:
6/7 + [-1/7]
Since the denominators are the same, add the numerators
6+-1 = 5
Put this over the common denominator
5/7
I think 5006.2 because you move the decimal place 3 times
(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.
Since f(2) is not given in the function definition, you must use f(n) with n=2. That tells you
... f(2) = -29 -f(1)
Now, f(1) is defined, so use that value.
... f(2) = -29 -(-16) = -29 +16
... f(2) = -13
Answer:
so 5w +3w=8w+12w= 20w -10 so the answer is 20w-10 that is how I learned