Answer:
hence cos ( 2 A ) = cos 2 A − ( 1 − cos 2 A ) = 2 cos 2 A − 1
Step-by-step explanation:Well we know that for two angles A , B
it holds that cos ( A + B ) = cos A cos B − sin A ⋅ sin B hence for A = B you get cos ( 2 A ) = cos 2 A − sin 2 A But sin 2 A = 1 − cos 2 A
Answer:

Then just plug in the values depending on the bridge you chose I'm pretty sure
also can I get brainliest?
The original price of the ring is <span>£</span>1400
Answer:
that will be 2130,1
Step-by-step explanation:
Answer:
5 times the square root of 2 or 7.071
Step-by-step explanation:
Hope it helps!