please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please solve it.
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Answer:
Step-by-step explanation:
Hi ,
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
Hope it helps
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