Question

Prove it and answer it please ​

Answer 1

Step-by-step explanation:

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${sina}^{4} + {cosa}^{4} + 2 {cosa}^{2} {sina}^{2}$

using the property :–

a²+b²+2ab = (a+b)²

${ ({sina}^{2} + { cosa }^{2} )}^{2}$

using the property :—

sin²a+cos²a = 1.

${(1)}^{2}$

$1.$

$HEARTLESS BoY♡$

Answer 2

Answer:

Sorry, I don't understand.

Step-by-step explanation: