Question

( 1+sinA ) ( 1- sinA) is​

Answer 1

Answer:

$cos ^{2} a$

Step-by-step explanation:

1-sin^2A

cos^2A

Answer 2

Answer:

$\huge{\boxed{\rm{\red{answer=Cos²A}}}}$

Step-by-step explanation:

Given:-

( 1+sinA ) ( 1- sinA)

This is in the form of (a+b)(a-b)

Here, a=1; b=SinA

we know that (a+b)(a-b)=a²-b²

=>1²-sin²A

=>1-Sin²A

=>Cos²A

(since Sin²A+Cos²A=1)

( 1+sinA ) ( 1- sinA)=Cos²A