Question

If sinA + cosA=1, then sinA.cosA=?

Answer 1

Step-by-step explanation:

HELLO

Given:

SinA + CosA = 1

let's assume values.

Case-1

Let's assume A is 90°

1 +0 = 1

In this case,

sinA.cosA=

1×0 = 0

Case-2

let's assume A = 0°

0 +1 = 1

In this case

sinA.cosA=

0×1 = 0

It think 2 cases are enough

so as our observation in both cases:

sinA.cosA= 0