Answer:
Step-by-step explanation:
We need to expand cos(a+b) using the cos addition formula.
We know that we also need to use Euler's formula for sin, which is:
(you can get this from a similar way of getting the first result, of simply just expanding and seeing the necessary result)
We can now substitute our cos's and sin's for e's
Now lets multiply out both of our terms, I'm using the exponent multiplication identity here ()
Now we can subtract these two terms.
This is starting to look a lot tidier, let's cancel the 2
Answer:
The answer matches with option A.
Step-by-step explanation:
We have to find the product of 100,000 and 1,000,000 using scientific notations.
Now, 100,000 can be written as and
1,000,000 can also be written as .
So, the product will give
100,000 × 1,000,000
=
=
=
So, the answer matches with option A. (Answer)
Answer:
31.1
Step-by-step explanation:
Answer:
D(THE LAST ANSWER CHOICE)
Step-by-step explanation:
Answer:
is it 49
Step-by-step explanation: