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5. ![\frac{12cos( \frac{3 \pi }{2}+ \beta )+92sin(57 \pi + \beta ) }{10cos( \frac{ \pi }{2}- \beta ) }= \frac{12sin \beta +92(-sin \beta )}{10(cos \frac{ \pi }{2}cos \beta +sin \frac{ \pi }{2}sin \beta ) } =\frac{12sin \beta -92sin \beta }{10(cos \frac{ \pi }{2}cos \beta + \frac{1}{2} *(cos( \frac{ \pi }{2}- \beta )-cos( \frac{ \pi }{2}+ \beta ))) } =- \frac{80sin \beta }{10sin \beta } =-8 \frac{12cos( \frac{3 \pi }{2}+ \beta )+92sin(57 \pi + \beta ) }{10cos( \frac{ \pi }{2}- \beta ) }= \frac{12sin \beta +92(-sin \beta )}{10(cos \frac{ \pi }{2}cos \beta +sin \frac{ \pi }{2}sin \beta ) } =\frac{12sin \beta -92sin \beta }{10(cos \frac{ \pi }{2}cos \beta + \frac{1}{2} *(cos( \frac{ \pi }{2}- \beta )-cos( \frac{ \pi }{2}+ \beta ))) } =- \frac{80sin \beta }{10sin \beta } =-8](https://tex.z-dn.net/?f=+%5Cfrac%7B12cos%28+%5Cfrac%7B3+%5Cpi+%7D%7B2%7D%2B+%5Cbeta+%29%2B92sin%2857+%5Cpi+%2B+%5Cbeta+%29+%7D%7B10cos%28+%5Cfrac%7B+%5Cpi+%7D%7B2%7D-+%5Cbeta+%29+%7D%3D+%5Cfrac%7B12sin+%5Cbeta+%2B92%28-sin+%5Cbeta+%29%7D%7B10%28cos+%5Cfrac%7B+%5Cpi+%7D%7B2%7Dcos+%5Cbeta+%2Bsin+%5Cfrac%7B+%5Cpi+%7D%7B2%7Dsin+%5Cbeta+%29++%7D+%3D%5Cfrac%7B12sin+%5Cbeta+-92sin+%5Cbeta+%7D%7B10%28cos+%5Cfrac%7B+%5Cpi+%7D%7B2%7Dcos+%5Cbeta+%2B+%5Cfrac%7B1%7D%7B2%7D+%2A%28cos%28+%5Cfrac%7B+%5Cpi+%7D%7B2%7D-+%5Cbeta+%29-cos%28+%5Cfrac%7B+%5Cpi+%7D%7B2%7D%2B+%5Cbeta+%29%29%29+++%7D+%3D-+%5Cfrac%7B80sin+%5Cbeta+%7D%7B10sin+%5Cbeta+%7D+%3D-8)
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