Author: Kyra

Something I learned this week (oct. 31- nov. 4)

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A useful skill we did in class this week was learning how to “FOIL” polynomials> FOIL is an acronym that stands for the First terms of the brackets, Outside terms, Inside terms, and Last terms of the brackets. In the example, (x^2-5)(y+2) the first step would be to multiply the first terms in each bracket, x^2 and y to get x^2y. Next is to multiply x^2 and 2 (the outside terms) with a product of 2x^2. Then -5 and y for the inside terms to get -5y. And lastly -5 and 2 for the last terms from each bracket to get -10. Our expression now stands as, x^2y+2x^2-5y-10 and as there are no like terms, we can’s simplify any further.

Something I learned this week (oct. 31- nov. 4)

Something I learned this week (Oct. 24-28)

KyraLeave a comment
This week, I learned how to use the acronym SOH CAH TOA to help find angles and sides of right angled triangles.
SOH represents “sine, opposite, hypotenuse” So to find the sine, you put the ratio of the opposite side over the hypotenuse. In this example, in respect to angle C, the sine is \frac{24}{25}
CAH represents “cosine, adjacent, hypotenuse”  To find the cosine, you put the ratio of the adjacent side over the hypotenuse. In this example, in respect to angle C, the cosine is \frac{7}{25}
TOA represents “tangent, opposite, adjacent” To find the tangent, you put the ratio of the opposite side over the adjacent. In this example, in respect to angle C, the tangent is \frac{7}{24}

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Something I learned this week (Oct. 24-28)