+0

# plllllzzzz help

0
95
2

Use an Addition or Subtraction Formula to write the expression as a trigonometric function of one number.

sin(12°) cos(18°) + cos(12°) sin(18°)

Apr 21, 2020

#1
+25480
+1

Use an Addition or Subtraction Formula to write the expression as a trigonometric function of one number.
$$\sin(12^\circ) \cos(18^\circ) + \cos(12^\circ) \sin(18^\circ)$$

$$\begin{array}{|rcll|} \hline && \sin(12^\circ) \cos(18^\circ) + \cos(12^\circ) \sin(18^\circ) \\ &=& \sin(12^\circ+18^\circ) \\ &=& \sin(30^\circ) \\ &=& \mathbf{0.5} \\ \hline \end{array}$$

Apr 21, 2020
#2
0

thhhhxxx

Guest Apr 21, 2020