What is the value of sin(42)cos(12)-cos(42)sin(12) ?

The value of sin(42)cos(12)-cos(42)sin(12) is 1/2

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sin(42)cos(12)-cos(42)sin(12)

sin (4 2^{\circ}) cos (1 2^{\circ}) - cos (4 2^{\circ}) sin (1 2^{\circ})

\frac{1}{2}

Solution steps

sin (4 2^{\circ}) cos (1 2^{\circ}) - cos (4 2^{\circ}) sin (1 2^{\circ})

Rewrite using trig identities:

sin (3 0^{\circ})

= sin (3 0^{\circ})

Use the following trivial identity:

sin (3 0^{\circ}) = \frac{1}{2}

= \frac{1}{2}

9.81 \cdot cos (3 0^{\circ})

50 arcsin (\frac{21}{5}) - 421

2 cos (6 0^{\circ}) + 4 tan (3 7^{\circ}) - sec^{2} (4 5^{\circ})

sin (26. 1^{\circ})

- csc (\frac{5 π}{3})

What is the value of sin(42)cos(12)-cos(42)sin(12) ?
The value of sin(42)cos(12)-cos(42)sin(12) is 1/2