In this video I will show you how to solve a trigonometric equation using the double angle for cosine. When applying the double angle of cosine we are given a quadratic equation where we will now need ...

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A caller named Bill from Pennsylvania put a question to consumer advocate Clark Howard on his podcast this week that cuts to the heart of how Americans think about restaurant tipping. “I’ve always ...

In this video I work through 68 examples of factoring quadratic expressions when a is not equal to one. The first couple of examples I explain the process of factoring by using the ac method and box ...