A calculus problem by حسن العطية

Calculus Level 1

lim⁡θ→0(cos⁡θ−sin⁡θ×cos⁡θ)(cos⁡θ+sin⁡θ×cos⁡θ)= ? \lim_{\theta \to 0} {(\cos \theta -\sin \theta \times \cos \theta)(\cos \theta + \sin \theta \times \cos \theta)} = \ ?

حسن العطية by حسن العطية
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