Answer:
1/2
Step-by-step explanation:
So do this, think of an equilateral triangle. A 30-60-90 triangle is just half of an equilateral triangle. If the original side length was x, then the hypotenuse is x, one leg is x/2, and the third, by Pythagorean theorem, is x sqrt3
Sin is opposite over hypotenuse, so we have (x/2)/x = 1/2
5 and 25
Step-by-step explanation:

the reason why the value is not an integer, is most likely because the 21.2<span>° is just an approximation.</span>
You can only add exponents if you are multiplying two of the same variable together. For example,

You take them away if you are dividing.
<span>

In a polynomial equation, you can add together two of the same variable if they have the same exponent
</span>

Or you can take them away in a similar fashion,
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But you cannot add two (or more) different exponents,
</span>

(it does not get any simpler)
I hope this has answered your question, if not, leave a comment and I'll update the answer.