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mathmath333
 one year ago
Trignometry question
mathmath333
 one year ago
Trignometry question

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mathmath333
 one year ago
Best ResponseYou've already chosen the best response.0\(\large \color{black}{\begin{align} & x\cos \theta \sin \theta =1 \hspace{.33em}\\~\\ & x^{2}+(1+x^{2})\sin \theta \ \text{equals} \hspace{.33em}\\~\\ & a.)\ 0 \hspace{.33em}\\~\\ & b.)\ 2 \hspace{.33em}\\~\\ & c.)\ 1 \hspace{.33em}\\~\\ & d.)\ 1 \hspace{.33em}\\~\\ \end{align}}\)

phi
 one year ago
Best ResponseYou've already chosen the best response.2one thought is to set theta to a particular value. for example let theta=0 (the idea is if w have an identity, it works for all values of theta) using that idea, from the first equation x cos theta  sin theta = 1 x = 1 and x=1 in the 2nd equation gives 1

mathmath333
 one year ago
Best ResponseYou've already chosen the best response.0is this question has to solved in 1 min there must be a trick here

mathmath333
 one year ago
Best ResponseYou've already chosen the best response.0beside \(\theta =0\)

phi
 one year ago
Best ResponseYou've already chosen the best response.2your answer choices are all numbers. that suggests the answer is independent of theta (otherwise we would have choices that are expressions with theta) so if theta does not matter, pick a value that is easy to evaluate.

phi
 one year ago
Best ResponseYou've already chosen the best response.2unfortunately, if we solve for x using the first equation x= (1+ sin A)/ cos A and plug that into the 2nd equation, we get a messy trig function wolfram can plot it. http://www.wolframalpha.com/input/?i=x^ {2}%2B%281%2Bx^{2}%29\sin+\theta+where+x+%3D+%281%2Bsin+\theta%29%2Fcos+\theta and I don't see how you get a single number out of that. in other words, I don't really understand how they get a constant number independent of theta... that appears bogus...

phi
 one year ago
Best ResponseYou've already chosen the best response.2the link did not post properly
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