SOLUTION: Write the expression as the sine or cosine of an angle. sin ( pi/2 ) cos (pi/7) + cos ( pi/2) sin (pi/7)

Algebra ->  Trigonometry-basics -> SOLUTION: Write the expression as the sine or cosine of an angle. sin ( pi/2 ) cos (pi/7) + cos ( pi/2) sin (pi/7)       Log On


   

Question 1138451: Write the expression as the sine or cosine of an angle.
sin ( pi/2 ) cos (pi/7) + cos ( pi/2) sin (pi/7)
Answer by ikleyn(52804) About Me  (Show Source):
You can put this solution on YOUR website!
.

sin (pi/2) = 1;   cos (pi/2) = 0.  Therefore,


sin ( pi/2 ) cos (pi/7) + cos ( pi/2) sin (pi/7) = 1*cos(pi/7) + 0*sin(pi/7) = cos(pi/7).


Solved, explained and completed.