6. Expand the left side:
Recall the Pythagorean identity,
which leaves us with
Recall the angle sum formula for cosine:
which gets us to where we need to be:
and we're done.
7. A. The formulas you need are
This gives
7. B. Solving for gives
which holds for
where is any integer.
7. C. Factorize as
From here, we have
which hold for
where is any integer.
Answer:
27/14
Step-by-step explanation:
1/2 * 3 6/7 =
1/2 * 27/7
= 27/14
The answer will be around 145
150 / 12 = 11.6666666667
11.6666666667 x 30 = approximately 350g of flour for 30 cakes
2.5418x10^12
you do 9x9x9x9x9x9x9x9x9x9x9x9x9