state sign of sin675°
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sin675= sin(630+45)
= sin (7×90 +45)
- cos 45
Hence the sign is negative
= sin (7×90 +45)
- cos 45
Hence the sign is negative
jay1224:
thank uh brother
Answered by
1
Answer: negative
Step-by-step explanation:
sin675 = sin (90*7 + 45) = - cos 45 = - 1/ (2^1/2)
because sin 675 lies in the fourth quadrant which is the quadrant of cos thus the value will be negative
P.S-and sorry for the root2 as my keyboard doesn't have a root key :)
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