Math, asked by jay1224, 1 year ago

state sign of sin675°

Answers

Answered by Anonymous
2
sin675= sin(630+45)
= sin (7×90 +45)
- cos 45
Hence the sign is negative

jay1224: thank uh brother
jay1224: can uh say 1 more ... cos573°
Anonymous: it's 540+33
Anonymous: So calcute 6×90+33
Anonymous: u know ASTC , by this it lies in 2nd quadrant
jay1224: thank you so much
Anonymous: u know ASTC , by this it lies in 2nd quadrant
Anonymous: It is of sin so , ur answer is negative
Anonymous: u know ASTC , by this it lies in 2nd quadrant
Anonymous: Please follow me I shall give answers of all it questions
Answered by rishikeshmondal30
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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