NCERT Class 10 Chapter 8 Trigonometry Official CBSE Board Sample Problems Short Answer
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Question
Prove that
Solution
LHS
(Rationalizing the denominator of I fraction by )
RHS=
(Rationalizing the denominator of 2nd fraction by
Now, LHS = RHS Hence proved
Question
Given , find the other trigonometric ratios of the angle A.
Solution
Given:
As
Now,
Also,
As
Question
Write the values of and . What happens to sec x when x increases from to ?
Solution
Angles () | |||||
1 | 2 | Not defined |
The value of sec x increases and finally reaches to not defined limit as x increases from to .
Question
If find the value of A.
Solution
Question
If , prove that
Solution
Question
If and
Find the value of
Solution
=1
Question
If , then find the value of
Solution
Question
Evaluate:
Solution
Question
If , where 5A and 4A are acute angles, find the value of A.