# What is Scalar Product?

Posted in Scalars and Vectors | Email This Post |Scalar product is the product of magnitude of two vectors and cosine of angle θ between them

**P × Q = PQ cos****Ɵ**

If P = P_{x}î + P_{y}ĵ + P_{z}k̂ and Q = Q_{x}î + Q_{y}ĵ + Q_{z}k̂

Then P ×Q = P_{x}Q_{z} + P_{y}Q_{y} + P_{z}Q_{z} …….. dot product

From the above equation we know that Power is a Scalar Quantity as it is a scalar product of two Vector Quantities.