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

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

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

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

4meisu Group TitleBest ResponseYou've already chosen the best response.0
Okay thank you
 2 years 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?
 2 years ago
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