given that π/2 ≤ θ ≤ 3π/2 and sin θ = -2/7 find sin(θ+π/4)
Hello, absolutjessy!
We are told that is in Quad 2 or Quad 3.
Sine is negative in Quad 3 and Quad 4.
. . Hence, is in Quad 3.
is in a right triangle with:
. . Then: .
We have: .
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