SOLUTION: Find the exact value of cos(pi) cos(3pi/4) + sin(pi) sin (3pi/4)
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Question 1036513
:
Find the exact value of cos(pi) cos(3pi/4) + sin(pi) sin (3pi/4)
Found 2 solutions by
jim_thompson5910, MathTherapy
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Answer by
jim_thompson5910(35256)
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We'll use the trig identity
use the trig identity (see above)
use the
Unit Circle
The final answer is
Answer by
MathTherapy(10552)
(
Show Source
): You can
put this solution on YOUR website!
Find the exact value of cos(pi) cos(3pi/4) + sin(pi) sin (3pi/4)
This represents the COSINE Difference of 2 angles, as follows:
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