Question

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

Answer 1

i think it's answer is 25

Answer 2

Hey !!

cosA = 2/5 = b/h

By using Pythagoras theorem

P = √h² - b²

P =√25 - 4

P = √21

tan²A = p/b = (√21/2)²

tan²A = 21/4

Now putting the value on question .

4 + tan²A

= 4 + 4×21/4

= > 4 + 21

= 25 Answer

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Hope it helps you !!!

@Rajukumar111