The phrase "a number of complementary" is correct and usable in written English.
It can be used when referring to several items or elements that enhance or complete each other.
Example: "The project requires a number of complementary skills to ensure its success."
Alternatives: "several complementary" or "various complementary".
The secretary has explored a number of complementary and innovative approaches.
Our Watch will run a number of complementary programs and campaigns, derived from the government's national plans to reduce violence against women.
By establishing a number of man-made island positions in the Spratlys, China seems to be pursuing a number of complementary goals.
Scenario and gaming techniques have a number of complementary characteristics.
A number of complementary morphological and structural characterizations were also performed.
This chapter describes a number of complementary approaches to the analysis and design of bonded repairs.
However, the potential of such data can only be harnessed using a number of different, complementary approaches and tools, and a unified platform for the analysis of disease outbreaks is still lacking.
To expand its global footprint, buying ICQ would make sense as it already has stakes in a good number of complementary companies that operate on an international level.
The somatoform disorders are an excluding diagnosis that forces to carry out a significant number of complementary tests and derivations to the second and third level.
The purpose behind the development of BEAST is to bring a large number of complementary evolutionary models (substitution models, insertion-deletion models, demographic models, tree shape priors, relaxed clock models, node calibration models) into a single coherent framework for evolutionary inference.
As demonstrated for wheat cell suspension cultures, the use of ESI in combination with fast polarity switching, the study of endogenous plant secondary metabolite precursors (for example, phenylalanine) directly results in a large number of complementary Phe-related metabolic features, which can be assigned to various structure classes.
