How do you solve 10sin(x-2)=-710sin(x2)=7?

1 Answer
Sep 15, 2016

70^@22 and 339^@087022and33908 for (0, 360)

Explanation:

First convert 2 radian to degrees
3.14 --> 180^@
1 radian --> 180/(3.14)
2 radian --> (2(180))/3.14 = 360/3.14 = 114^@652(180)3.14=3603.14=11465
The equation becomes:
10sin(x - 114.65) = - 7
sin (x - 114.65) = -7/10 = - 0.7
Calculator and unit circle -->
Arc (x - 114.65) = - 44^@43(x114.65)=4443
arc (- 44.43) is co-terminal to arc (360 - 44.43 = 315^@57)(36044.43=31557)
and arc x - 114.65 = 180 + 44.43 = 224^@43x114.65=180+44.43=22443
a. x - 114.65 = 224.43 --> x = 339^@08x=33908
b. x - 114.65 = 315.57 --> x = 430^@32x=43032, or 70^@227022
Answer for (0, 360):
70^@22; 339^@087022;33908