Solve the trigonometric equation sin35 ° ⋅cos15 ° −cos35 ° ⋅sin15 °

univerkov | September 29, 2021 | education

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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