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4meisu
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Given that 2sin^2 θ + sinθ  1 = 0, find the two values for sin θ
 one year ago
 one year ago
4meisu Group Title
Given that 2sin^2 θ + sinθ  1 = 0, find the two values for sin θ
 one year ago
 one year ago

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ashna Group TitleBest ResponseYou've already chosen the best response.1
2sin² θ + sin θ  1 = 0 (2sin θ  1)(sin θ + 1) = 0
 one year ago

lgbasallote Group TitleBest ResponseYou've already chosen the best response.0
imagine \(\sin \theta = x\) so this thingy will become 2x^2 + x  1 = 0 do you know how to solve for x there?
 one year ago

ashna Group TitleBest ResponseYou've already chosen the best response.1
so much can you understand ?
 one year ago

4meisu Group TitleBest ResponseYou've already chosen the best response.0
No I do not know how to solve for x.. What's next?
 one year ago

ashna Group TitleBest ResponseYou've already chosen the best response.1
Now we can split that into two equations 2sin θ  1 = 0 and sin θ + 1 = 0 this much understood ?
 one year ago

4meisu Group TitleBest ResponseYou've already chosen the best response.0
sinθ = 1/2 and sinθ = 1 ?
 one year ago

ashna Group TitleBest ResponseYou've already chosen the best response.1
Solving the first one: 2sin θ  1 = 0 sin θ = 1/2 θ = 30°, 150°
 one year ago

ashna Group TitleBest ResponseYou've already chosen the best response.1
Second: sin θ + 1 = 0 sin θ = 1 θ = 270°
 one year ago

4meisu Group TitleBest ResponseYou've already chosen the best response.0
Okay thank you
 one year ago

4meisu Group TitleBest ResponseYou've already chosen the best response.0
The question is asking for only two values for theta though, which one would we choose?
 one year ago
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