Question

please answer this question fast...

if tana=3/4 then find the value of cos^2A-sin^A​

Answer 1

Answer:

Step-by-step explanation:

cos^A = 16/25

sin^A = 9/25

therefore, 16/25-9/25

=16-9/25

=7/25

Answer 2

tanA=3/4 = p/b

p=3, b=4, h=?

h=√p^2 + b^2

= √3^2 + 4^2

= √ 9 + 16 = √25 = 5

cos^2A - sin^2A

(b/h)^2 - (p/h)^2

(4/5)^2 - (3/5)^2

16/25 - 9/25 = 7/25