Asked by valeria

for all values of theta where 0degrees<theta<360degrees

2sin^2 theta -3sintheta = -1

Answers

Answered by Reiny
This is a quadratic which factors ...

2sin^2 Ø - 3sinØ + 1 = 0
(2sinØ - 1)(sinØ - 1) = 0
sinØ = 1/2 or sinØ = 1
Ø = 30° or 150° or Ø = 90°
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