Prove tan^2theta -1/cos^2theta +1=0
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Solution :
Here I am using A instead of theta.
************************************
We know the Trigonometric identity:
tan²A + 1 = sec² A
and
1/Cos A = sec A
*************************************
Now ,
LHS = tan²A - 1/cos²A + 1
= ( 1 + tan² A ) - 1/cos²A
= sec²A - sec²A
= 0
= RHS
••••
saanchimisser:
Actually there is a mistake int he last step...
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