Question
Two adjacent sides of a parallelogram ABCD are given by 
and 
. The side AD is rotated by an acute angle 
in the plane of parallelogram so that AD becomes AD. If AD makes a right angle with the side AB then the cosine of angle is given by
- 8/9
- 1/9
The correct answer is: 8/9
Related Questions to study
At A, h>0 and 
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For such questions, we should know different formulas of limit.
For such questions, we should know different formulas of limit.
For such questions, we should know different formulas of limits. We should try different methods to simplify the function in a way that it doesn't become zero.
For such questions, we should know different formulas of limits. We should try different methods to simplify the function in a way that it doesn't become zero.
For such questions, we should know different formulas of limits.
For such questions, we should know different formulas of limits.
For such questions, we should know different formulas of limits.
For such questions, we should know different formulas of limits.
For such questions, we should know different formulas of limits.
For such questions, we should know different formulas of limits.
For such questions, we should know different formulas of limits. We should know L'Hospitals rule to solve question.
For such questions, we should know different formulas of limits. We should know L'Hospitals rule to solve question.
(i) 
(ii) Then,
