Hello :
(sec²x - 1) / sec²x = (sec²x / sec²x) -1/sec²x
= 1 -1/sec²x
= 1- (1/secx)²
= 1 -cos²x
= sin²x
Oil well: Edwin Drake
Light bulb: Thomas Edison
Model T: Henry Ford
Ford competition: Duryea
Airplane: Wright brothers
Telephone: Alexander grand bell
Transatlantic cable: Cyrus west Field
Answer:
1/6
Step-by-step explanation:
Six billion three hundred ninety four thousand and three
The answer is 3.71
First u add 1.8 and 2.2 and get 4. Then u subtract 30 by the 4 u got. Finally u divide 26 by 7 and get x = 3.71 :)
