WHEN IS AN EQUATION CALLED "AN IDENTITY". PROVE THAT 1+ tan2A=sec 2A.
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★ TRIGONOMETRIC REDUCTIONS ★
If two expressions are equal for all the values of same parameter or parameters , then the statement of equality between the two expressions is called an identity
Verification :
1 + TAN2A = SEC 2A
For A = 0°
Tan 2A = 0
Sec 2A = 1
Hence , 1 + 0 = 1 proved
It's a universal truth HENCE , It's an identity
★✩★✩★✩★✩★✩★✩★✩★✩★✩★✩★
If two expressions are equal for all the values of same parameter or parameters , then the statement of equality between the two expressions is called an identity
Verification :
1 + TAN2A = SEC 2A
For A = 0°
Tan 2A = 0
Sec 2A = 1
Hence , 1 + 0 = 1 proved
It's a universal truth HENCE , It's an identity
★✩★✩★✩★✩★✩★✩★✩★✩★✩★✩★
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