Question

1- cos square A is equal to​

Answer 1

Answer:

sin^2A+ cos^2 A=1

sin^2A=1-cos^2A

Answer 2

Given:

Consider the given trigonometric expression is

$1-cos^2A$

Find:

Need to find trigonometric value that will equal to it

Solution:

we have the trigonometric identity

$sin^2A+cos^2A=1$

Subtracting $cos^2A$ from both the sides we have

$sin^2A+cos^2A-cos^2A=1-cos^2A$

$sin^2A=1-cos^2A$

Therefore the answer is $sin^2A$