Question

tan A=3/4, then find the value of cos²A-sin²A​

Answer 1

Answer:

tan A = perpendicular/base

so. perpendicular=3

base=4

hypotenuse=?

hypotenuse² = perpendicular² + base²(Pythagoras theorem)

H² = 3²+4²

H²=9+16

H²=25

H=25

sin²A= (3/5)²

Sin²A =9/25

Cos²= (4/5)²

cos²A = 16/25

cos²A - sin²A

16/25 - 9/25

7/25

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

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