Guys please telle the answer of COS315° = – InterviewSolution

1.

Guys please telle the answer of COS315° =

Answer»

Answer:

1/√2 is the answer

Step-by-step EXPLANATION:

GIVEN that : Cos 315°

It can be WRITTEN as cos (360°-45°)

We know that Cos(360°-A)=Cos A

now, Cos 315°

=>cos (360°-45°)

=>Cos 45°

=> 1/√2

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