Question

( SinA + CosA)²= 1+2 SinA×CosA​

Answer 1

Answer:

look at image

Explanation:

i think we have to prove formula which is most important

Answer 2

Explanation:

we need to prove that,

( SinA + CosA)²= 1+2 SinA×CosA

therefore, we know,

{(a+b)^2=a^2+b^2+2ab}

from that equation; we get;

sin^2A+cos^2A+2SinA×CosA

(sin^2A+cos^2A)+2sinAcosA

now,

we know that ,

{sin^2A+cos^2A = 1}

from this we get;

1+2SinA×CosA