Q10 of 113 Page 526

Prove that


To prove:

Taking LHS,



Putting π = 180°



= tan2 60° + 2 cos2 45° + 3 sec2 30° + 4 cos2 90°


Now, we know that,






Putting the values, we get




= 3 + 1 + 4


= 8


= RHS


∴ LHS = RHS


Hence Proved


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