⚠︎ ᴅᴏɴ'ᴛ sᴘᴀᴍ
Answers
Correct Question:-
If , then find the value of k.
Given:-
To Find:-
The value of k.
Solution:-
For this question we need to simplify LHS first.
So, firstly taking LHS,
Taking LCM,
=
=
=
=
=
=
Since, it is given in the question that,
Therefore,
=
=
=
=>
Therefore, the value of k is 2.
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How did I solve it?
→ For this question we had to solve the LHS first in order to find the value of LHS which is equal to RHS for finding the value of k. So I first solved the LHS and found it's value and after equating LHS with RHS we got the value of k as 2.
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Points to remember!!!
We must know some identities like:-
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sec^2 theta (1+sin thata ) ( 2- sin theta ) = sec ^2 theta ( 1-sin theta) (a+b) (a-b) = (a^2 - b^2) =sec^2 theta .cos ^2 theta =1. ( cos sq. theta + sin sq theta =1) k=1