Test Index

NDA Math Trigonometric Ratios of Angles and Equations

Show Para Hide Para

Consider the following for the next 02 (two) items:
It is given that cos(θ−α )=a, cos(θ−β )=b.

[NDA I 2019]

© examsnet.com

Question : 5

Total: 100

What is cos(α - β) equal to ?

ab+√1−a2√1−b2
ab-√1−a2√1−b2
a√1−b2−b√1−a2
a√1−b2+b√1−a2

Go to Question:

Prev Question

Next Question