Question

if cos A=2/5,find value of 4+4 tan square

Answer 1

Hey... I think this can be ur answer dear!!
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Cos A = 2/5
Sec A =5/2

Now,
4+4 tan2A
4(1+ tan2 A)
4 Sec2 A ( Sec2 - tan2 =1)
4*(5/2)2
25

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Hope it helps you dear ☺️☺️