Answer:
Step-by-step explanation:
It’s made up of the 1 dollar coin , .50 cents coin, .25 cents coin, and the .10 cents coin. If you multiply each by 25 you get the exact value , so these coins make it up but there is exactly 25 of each
Area of the triangle:
A = 1/2 · c · b · sin A =
= 1/2 · 30 · 14 · 0.766 ≈ 160.87 ft²
Answer: 160.87 ft²
Answer:
...
Step-by-step explanation:
...
If you mean to find 4 cos(2<em>a</em>), then recall the double angle identity for cosine:
cos(2<em>x</em>) = 2 cos²(<em>x</em>) - 1
so that
4 cos(2<em>a</em>) = 4 (2 cos²(<em>x</em>) - 1) = 4 (√3 - 1)
