brennagoodwin4 brennagoodwin4
  • 23-03-2018
  • Mathematics
contestada

PLEASE HELP!! If the sin 75° is 0.966, then the cos ____° is 0.966.

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evgeniylevi
evgeniylevi evgeniylevi
  • 23-03-2018
Try this option (this is only one way):
1. rule: 
[tex]sin \alpha =cos( \frac{ \pi }{2} - \alpha)[/tex]
2. according to the rule
[tex]sin75=0.966=cos( \frac{ \pi}{2} -75)=cos15[/tex]

answer: cos15°.
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