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zzr0ck3rBest ResponseYou've already chosen the best response.0
cos(x) = 3/11 has infinite solutions
 8 months ago

zzr0ck3rBest ResponseYou've already chosen the best response.0
forget what I said, they just want the one
 8 months ago

zzr0ck3rBest ResponseYou've already chosen the best response.0
cos^(1)(3/11) = 105.8 now sin(105.8) = .9622
 8 months ago

surjithayerBest ResponseYou've already chosen the best response.1
\[put \cos^{1} \left( \frac{ 3 }{ 11 } \right)=x\] \[\cos x=\frac{ 3 }{ 11 }\] hence x lies in second or third quadrant. \[\sin x=\sqrt{1\left( \frac{ 3 }{11 } \right)^{2}}=\sqrt{1\frac{ 9 }{121 }}=\frac{ \sqrt{112} }{11 }\] sin x can be positive or negative according as x lies in second or third quadrant. plug in sin 2x= 2 sin x cos x
 8 months ago

helpplease1Best ResponseYou've already chosen the best response.0
wow thank you so much!
 8 months ago

zzr0ck3rBest ResponseYou've already chosen the best response.0
woops I didn't notice the 2
 8 months ago
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