Cos theta = (a^2+b^2/2ab) where a and b are two distinct numbers such that ab 0 is it true - Maths - Introduction to Trigonometry

Question

Cos theta = (a^2+b^2/2ab) where a and b are two distinct numbers
such that ab>0 is it true

Shivam Mishra · Accepted Answer

Dear Student,
Refer the following link:

https://www meritnation
com/ask-answer/question/check-whether-the-result-is-true-or-false-cos-a-a-square/introduction-to-trigonometry/9499649

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Cos theta = (a^2+b^2/2ab) where a and b are two distinct numbers such that ab>0. is it true