Side a=12
measure of angle B = 70
measure of angle C= 15
How do I find the answer using Law of Sines?

Question

Side a=12
measure of angle B = 70
measure of angle C= 15
How do I find the answer using Law of Sines?

precal · Answer

for the laws of sine you need one angle and side.
180 - 70-15=95 degrees is angle a
a/sin(A) = b/sin(B)
small letters denote sides, Capital letters denote Angles

precal · Answer

To find side c
use
a/sin(A)=c/sin(C)

anonymous · Answer

Thanks! Your a life saver!

precal · Answer

Make sure your calculator is in degree mode.

anonymous · Answer

Always, if not my teacher would kill me!

precal · Answer

Well in precal, we go back and forth from degrees to radians,
In calculus, we stay in radian.

anonymous · Answer

Wow in geometry we just stay in degree because we only use the calc of Sine, Cosine, and Tangent.

precal · Answer

Yes, I forgot in geometry they also, stay in the land of degrees.  If you plan to study the higher mathematics, you will have to visit the land of radian.