This week we learned chapter 8. This chapter is neither hard nor complicated , but rather tedious. There are a lot of rules you must follow and it is a lot to remember. The first thing we learned was Angles of Inclination, and solving simple trigonometric equations. We later learned identies, and the curves of sine and cosine.
In section 8-1 we learned to find angles of inclination.
Lines must be in y=mx+b form, or slope intercept form. Conics however, they can be in point slope form.
Ex. The inclination of a line is 140°, what is slope.
To find slope”m” we use the formula m=tanα .
m=tan(140) α= angle of inclination*
m=-.8391 final answer .
Ex. The slope of a line is 3/5, find its angle of inclination.
It is given that m=3/5. We are looking for angle of inclination, α .
m=tanα
3/5=tanα
α=tan-1(3/5) * to solve for alpha you must take the inverse.
α= 31°
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