Question

Read the following paragraph and answer the following questions. (5)
It is an important copying machine used in all fields such as education, business, government and private offices. It is a common saying that everyone is Xerox.
Chester Carlson, a New York-based patent lawyer and part-time researcher, had to read a lot of paperwork for his business, and that workload pushed him toward innovation. He used his kitchen for electronic photography. He made the world's first photograph in 1938 with a sulfur-coated zinc plate. Xerography in Greek means dry writing. He introduced the machine to the world in 1959. Today, many large companies make and sell photocopiers, but the name Xerox remains.



Questions
What is Xerography?
Who Invented the Xerox Machine?
When was the Xerox machine introduced?
With what was the first photograph taken?
Year used for electronic photo surveys?​

Answer 1

Answer:

1. Xerography is a dry photocopying technique. Originally called electrophotography, it was renamed xerography—from the Greek roots ξηρός xeros, "dry" and -γραφία -graphia, "writing"—to emphasize that unlike reproduction techniques then in use such as cyanotype, the process of xerography used no liquid chemicals.

2. James Watt

Chester Carlson

3. Oct. 22, 1938

4. The photo, taken by French inventor Joseph Nicéphore Niépce in 1826 or 1827, captures the view outside his window in Burgundy. He snapped the shot with a camera obscura by focusing it onto a pewter plate, with the whole process taking him about eight hours.

Answer 2

Answer:

Hᴇʏ ɢᴜʏs,

$\begin{gathered}\begin{gathered}\begin{gathered}\begin{gathered}\begin{gathered}\begin{gathered}\sf Trigonometry\: Table \\ \begin{gathered}\begin{gathered}\begin{gathered}\begin{gathered}\boxed{\boxed{\begin{array}{ |c |c|c|c|c|c|} \bf\angle A & \bf{0}^{ \circ} & \bf{30}^{ \circ} & \bf{45}^{ \circ} & \bf{60}^{ \circ} & \bf{90}^{ \circ} \\ \\ \rm sin A & 0 & \dfrac{1}{2}& \dfrac{1}{ \sqrt{2} } & \dfrac{ \sqrt{3}}{2} &1 \\ \\ \rm cos \: A & 1 & \dfrac{ \sqrt{3} }{2}& \dfrac{1}{ \sqrt{2} } & \dfrac{1}{2} &0 \\ \\ \rm tan A & 0 & \dfrac{1}{ \sqrt{3} }&1 & \sqrt{3} & \rm \infty \\ \\ \rm cosec A & \rm \infty & 2& \sqrt{2} & \dfrac{2}{ \sqrt{3} } &1 \\ \\ \rm sec A & 1 & \dfrac{2}{ \sqrt{3} }& \sqrt{2} & 2 & \rm \infty \\ \\ \rm cot A & \rm \infty & \sqrt{3} & 1 & \dfrac{1}{ \sqrt{3} } & 0 \end{array}}}\end{gathered}\end{gathered}\end{gathered} \end{gathered}\end{gathered}\end{gathered}\end{gathered}\end{gathered} \end{gathered}\end{gathered}$

TrigonometryTable

Qᴜᴇsᴛɪᴏɴ-:

Eᴠᴀʟᴜᴀᴛᴇ ᴛʜɪs :

I) sɪɴ60°ᴄᴏs30°+sɪɴ30°ᴄᴏs60°

Yᴏᴜ ᴄᴀɴ ᴛᴀᴋᴇ ʜᴇʟᴘ ғʀᴏᴍ ᴛʜᴇ ᴀʙᴏᴠᴇ ᴛᴀʙʟᴇ.