This expression is very easy to solve.
Using a well-known formula.
sin (α – β) = sin (α) * cos (β) – cos (α) * sin (β).
Let’s transform the expression using the above formula.
All is ready.
sin35 ° * cos15 ° – cos35 ° * sin15 ° = sin (35 ° – 15 °) = sin20 ° = 0.342.
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