# Posts by NeedHelpPlz

Total # Posts: 5

**Math**

how do you know what is the side lengths for the cot-60 angle?

**Math**

I don't get how you get these answers: cos180 degree = -1 sin45 degree = root(2)/2 cos(-135) = -root(2)/2 cot(-60) = -1/root(3) or -root(3)/3 What does cos or sin do to make the answer different? please help

**Earth Science**

can someone help me? you are given a sample of an unknown mineral. you determine that the mineral's streak is whte and its specific gravity is 2.8. is the mineral most likely to be a metallic mineral or a nonmetallic mineral? explain your answer. please help

**Earth Science**

I've been stuck on this question for half hour so please help me According to the principle of supply and demand, the price you pay for a product is determined both by its availability and by consumer demand for the product. on the basis of this principle, which minerals ...

**Earth Science**

a sample of magma flows very quickly. Would you expect it to contain high or low amounts of silica? Why? please help

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