The limit of (SiN x) ^ 2 - (sin 1) ^ 2 of X-1, X tends to 1

The limit of (SiN x) ^ 2 - (sin 1) ^ 2 of X-1, X tends to 1

According to the law of lobida, we can get 2sinxcosx by deriving the numerator and denominator respectively. If we bring in x = 1, we can get 2sin1cos1 = sin2