#### Trigonometric Identity - Product to Sum 2/2

<b>Product to Sum Trigonometric Identity Involving (sin(a)*cos(b) and cos(a)*sin(b))</b><p>Video Tutorial: Writing a product of sine and cosine as a sum or difference.</p>

**Product to Sum Trigonometric Identity Involving (sin(a)*sin(b) and cos(a)*cos(b))**

Video Tutorial: Writing a product of two sine functions and the product of two cosine functions as a sum or difference.

**Categories**

<b>Product to Sum Trigonometric Identity Involving (sin(a)*cos(b) and cos(a)*sin(b))</b><p>Video Tutorial: Writing a product of sine and cosine as a sum or difference.</p>

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**FREE**

This video explains how to write a sum and a difference involving cosine as a product.

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**FREE**

This video explains how to write a sum and a difference involving sine as a product.

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**FREE**

<b>Sum to Product Trigonometric Identity Involving Cosine</b><p>
Video Tutorial: How to write a sum and a difference involving cosine as a product.</p>

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**FREE**

This video explains how to compare the mean and standard deviation of two groups of data.

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**FREE**

This lesson explains how to find the probability to two independent events.

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This video explains how to solve an exponential equation by isolating the exponential part and then writing as a logarithmic equation.

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This video provides an example of how to solve a rational inequality.

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I originally produced this resource to help my own children learn to tell the time. It has since been used extensively to support teaching time telling to children aged between 5 and 10 years of age.<br />
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This Math resource provides clear visuals and activities to support children in the development of time telling skills. The aim is to encourage children to take a hands on approach and enjoy learning to tell the time.<br />
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Slides are provided in three different formats; full colour, black and white photocopiable and tinted dyslexia friendly.<br />
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By START #ART

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**$3.00**

Beginning with a quick refresher of the definition of closure, this advanced (extra credit?) worksheet asks students, "In which of these 20 examples of a set and an operation is the set closed under the operation?"<br />
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Examples include: "Composite numbers under multiplication?", "Even numbers under addition", "Square numbers under addition."<br />
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I hope it challenges most of if not all of your brightest students!<br />
<br />
-Briandx<br />
My First Worksheet!

By briandx

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**$0.50**

Easy print-and-cut-out resources. Recommend that you use card-stock. See attached directions for a example problem that it can be used for. Cut out the triangles at the bottom of the page first!<br />
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This is a great resource for when you first introduce the unit circle and sign and cosine. By cutting out the triangles and placing them appropriately on the unit circle students can "see" the values trigonometric (trig) functions of common values such as 30 degrees, pi/4, etc. Students get very engaged using this tool, and really "internalize" rather than just "memorize" these important facts and concepts.<br />
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Alignment to:<br />
Precalculus, Precalc, Trigonometry, Trig, Ratios, CCSS<br />
CCSS.MATH.CONTENT.HSF.TF.A.1, CCSS.MATH.CONTENT.HSF.TF.A.2, CCSS.MATH.CONTENT.HSF.TF.A.3, CCSS.MATH.CONTENT.HSF.TF.A.4, CCSS.MATH.CONTENT.HSF.TF.B.5, CCSS.MATH.CONTENT.HSF.TF.B.6, CCSS.MATH.CONTENT.HSF.TF.B.7, CCSS.MATH.CONTENT.HSF.TF.C.8, CCSS.MATH.CONTENT.HSF.TF.C.9<br />
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By jjerickson

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**$2.00**

Hi,<br />
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This is a creative and engaging game. <br />
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There are 15 timed questions - they are all linked to the main slide. <br />
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The purpose - if the class get 12 or more correct, they win the reward. If they get less than 12, they get the punishment!<br />
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Be careful - each questions has a countdown timer!<br />
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This is adaptable to any subject, for any age by simply over-typing the questions. <br />
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This is the easiest and most engaging way to have a revision quiz!!<br />
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Enjoy<br />
<br />
Copyright M Willetts

By Boosteration

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**$2.00**