1.

If 2x = secA and 2/x = tanA, prove that (x2 – 1/x2) = ¼​

Answer»

Answer:

secA = 2X -----( 1 )

tanA = 2/X ------( 2 )

sec² A - tan² A = 1

( 2x )² - ( 2 /x )² = 1

4x² - 4/x² = 1

4 ( x² - 1/ x² ) = 1

2( x² - 1/ x² ) = 1/2

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