Question

cos²A+ sin²A= _________​

Answer 1

Answer:

1

Step-by-step explanation:

Hope this helps you...

Answer 2

Answer:

1

Step-by-step explanation:

a^2 + b^2 = c^2

if you use a unit circle with sinA and cosA then c is 1

and so if you substitute cos^2(A) for a and sin^2(A) for b you get

cos^2(A) + sin^2(A) = 1^2 = 1