SOLUTION: Use the characteristics of f(t) = sin t to find the value of sin t when t=-21π/4 I badly need your help :-( as I dont really know how to solve this.
here are the choices to
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here are the choices to
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Question 1079851: Use the characteristics of f(t) = sin t to find the value of sin t when t=-21π/4 I badly need your help :-( as I dont really know how to solve this.
here are the choices to choose from
a. sin t = 0
b. sin t = 1
c. sin t = -√2/2
d. sin t = √2/2 Found 3 solutions by MathLover1, MathTherapy, ikleyn:Answer by MathLover1(20850) (Show Source):
You can put this solution on YOUR website! Use the characteristics of f(t) = sin t to find the value of sin t when t=-21π/4 I badly need your help :-( as I dont really know how to solve this.
here are the choices to choose from
a. sin t = 0
b. sin t = 1
c. sin t = -√2/2
d. sin t = √2/2
is in the 3rd quadrant, but is in the 2nd quadrant, and has a REFERENCE angle of .
Thus,
The angle is geometrically equivalent to = = ,
which, in turn, is geometrically equivalent to
= = ,
which, in turn, is simply the same as .
The function sine is periodical with the period of , therefore,
= = = = .
