Question

Pls someone answer this

Answer 1

Answer:

Step-by-step explanation:

Evaluate sin 42. sin 48 - Cos42. Cos48

= Sin 42 = Sin 90-48 = cos 48

so substitute sin 42

cos 48. sin 48 - Cos42.cos48

Sin 48 = Sin 90-42 = Cos42

Now Substitute It

cos48. Cos42 - cos42 . Cos 48

= All Digits Are Same To We Can Subtract Them And The Answer Is 0