(2x10^3) x (4x10^4) = 8x10^1
The second one is the answer
Answer:
The answer might be B
Step-by-step explanation:
Answer:
11/20
Step-by-step explanation:
I turned them in to improper fractions, divided, then simplified
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