4.9
We reviewed for the upcoming test. Spent some time on basic problems with derivatives. Spent a bit of time on word problems with optimization. There, for a few problems it involved 'showing' that an …
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Tutoring Calculus, Looking at limits
We mostly went over problems with limit. For the types of functions we usually see, if you approach a spot from the left and from the right, the two approaches end up at the same place. When …
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Tutoring Prealgebra- combining like terms, dividing by fractions
We started by looking at how to combine 'like terms'. Numbers can be added and subtracted, they are 'like'. Also numbers of x or y or z. x^2 and y^2, etc are also like. Looked at factoring …
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“Why is it that sin(θ+π/2)=cos(θ) for all angles θ?”
If you look at the graphs, you can see that they are different by a phase angle of pi/2. You can also use the equation for sin(A+B) …
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Tutoring Precalculus, Using Reciprocals
We went through the midterm test. A few concepts were missing in his approach, like absolute value and a mistake with adding negative numbers. Spent a bit of time on changing fractions by multiplying …
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Tutoring Calculus – Options for Basic Integrals
We reviewed for a test today. It focuses on anti-derivatives (indefinite integrals). There are a few options for approaching the problems. With u-substitution, you should be able to see fairly soon …
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