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Trigonometry
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Question:

Functions and theorems of the right angled triangles

Shravan S.

Now as we all know that the one of the triangle of the right angle triangle is of 90 degrees and the sum of the remaining two angles will always be equal to 90 degrees. Pythagoras Theorem: it states that the in a right angle triangle addition of square of length of two sides of the triangle adjacent to 90 degree angle is equal to the square of length of the hypotenuse. If a, b and c are the lengths of the sides of the right angle triangle where a is the length of hypotenuse than the relation that can be formed according to Pythagoras theorem is: a2 = b2 + c2 There are also Trigonometric functions, which are sine function, cosine function and tangent function. These are basically the relations that used in the right angle triangles to determine the length of sides. Suppose we consider an angle X in an right angled triangle except the 90 degree angle then these functions are defined as follows sine function is defined as the ratio of length of side opposite to the angle X to the length of hypotenuse Cosine function is defined as the ration of length of side adjacent to the angle X to the length of hypotenuse Tangent function or tan function is the ration of length of side opposite to angle X to the length of side adjacent to angle X Based on these trigonometric functions the Pythagorean identities are derived.

Physics
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Question:

The science behind the Rainbows

Shravan S.

Rainbows are the beautiful naturally occurring optical phenomenon. The visible light or white light in this case sun light consists of seven different colours or spectrums which are violet, indigo, blue, green, yellow, orange and red. So what happens is when the sunlight hits the droplets of water or the raindrops the part of it is reflected back in to the atmosphere and the remaining gets refracted and enters inside the droplet. This entered sunlight travels inside the drop and gets reflected from the internal surface of the drop and refracts back in to atmosphere. At this moment another optical phenomenon takes place called scattering of light, which divides the single spectrum of visible light or sunlight to seven spectra causing the effect of Rainbows.

Basic Chemistry
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Question:

What is chemistry?

Shravan S.

Chemistry to some people is just about study of chemicals getting mixed and the result. But chemistry more than just mixing of few components it tell us about why the mixing happens, what happens when you mix them like when hydrogen reacts with oxygen to give water or when sodium reacts with chlorine to give sodium chloride or common salt. Chemistry tells why some things occur in the way as we see them. Chemistry is everywhere from the water we drink to the reactions happening inside our body form, naturally occurring things to human made things. Basically if we define chemistry it is the physical science that deals with the change of matters and their properties, compositions and structures.

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