**See Also**

expressions video, trigonometric expressions video.

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This math video tutorial gives a step by step explanation to a math problem on "Multiplying Trigonometric Expressions".

Multiplying trigonometric expressions video involves expressions, trigonometric expressions. The video tutorial is recommended for 7th Grade, 8th Grade, 9th Grade, 10th Grade, 11th Grade, and/or 12th Grade Math students studying Algebra, Trigonometry, Pre-Algebra, and/or Advanced Algebra.

An expression is a combination of numbers, operators, grouping symbols (such as brackets and parentheses) and/or free variables and bound variables arranged in a meaningful way which can be evaluated. Bound variables are assigned values within the expression (they are for internal use) while free variables can take on values from outside the expression.

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