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

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23-03-2018
Mathematics

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

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evgeniylevi evgeniylevi · Answer 1 · 2018-03-23T04:44:38+01:00

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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