# The Riddle - I Could be Used in Many Ways

In whole, you may use me in the measuring.

With my $$1^{st}$$ & $$2^{nd}$$ part, you may use me in the coloring.

With my $$2^{nd}$$ & $$3^{rd}$$ part, you may use me in the casting.

With my $$3^{rd}$$ & $$4^{th}$$ part, you may use me in the integrating.

With my $$4^{th}$$ & $$5^{th}$$ part, you may use me in the displaying.

With my $$5^{th}$$ & $$6^{th}$$ part, you may use me in the lighting.

Who/What am I?

Hint 1:

For functions in each clause:

measuring -> for the projection
coloring -> for the decoration
casting -> for the hardness
integrating -> for the conduction
displaying -> for the monitor
lighting -> for the attraction

Hint 2:

Hint 3:

All the parts mentioned in clauses has the same length

• lightening or lighting? – user57528 Oct 3 '19 at 10:35
• @none Hmm, I think both are OK, just less meaning difference :) – Conifers Oct 3 '19 at 10:44
• Hmm, think a bit, I changed to the "lighting" to avoid interpreted as "lose weight". – Conifers Oct 3 '19 at 10:52
• you're such an inspiring user! – Omega Krypton Oct 3 '19 at 12:20
• It's my pleasure :D – Conifers Oct 3 '19 at 13:03

I'm almost certain the answer is

cosine

In whole, you may use me in the measuring.

If $$\theta$$ is the angle measured counterclockwise from the $$x$$-axis along the arc of the unit circle then $$\cos \theta$$ is the horizontal coordinate of the arc endpoint, i.e, the length of the projection of the radius onto the horizontal axis.

With my 1st & 2nd part, you may use me in the coloring.

Co - the chemical symbol for cobalt, which is used in pigments such as cobalt blue, cerulean clue and cobalt green.

With my 2nd & 3rd part, you may use me in the casting.

Os - the chemical symbol for Osmium. Manufacturers use its alloys with platinum, iridium, and other platinum-group metals in applications that require extreme durability and hardness.

With my 3rd & 4th part, you may use me in the integrating.

Si - the chemical symbol for Silicon, which is used heavily in integrated electric circuits.

With my 4th & 5th part, you may use me in the displaying.

In - the checmical symbol for Indium. The primary consumption of indium worldwide is LCD production.

With my 5th & 6th part, you may use me in the lighting.

Ne - the chemical symbol for Neon, which is often used in signs and produces an unmistakable bright reddish-orange light.

• You are a step closer to the chemists :P – Conifers Oct 19 '19 at 0:19