noelleA
noelleA
08-06-2017
Mathematics
contestada
Someone please help me
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mreijepatmat
mreijepatmat
11-06-2017
sin² Ф + cos² Ф =1, if sin Ф = 11/61, that means cos² Ф =(11/61)²
(11/61)² + cos² Ф = 1; cos² Ф = 1 - (11/61)²
cos² Ф = 3600 / 3721 and cos Ф =√(3600/3721) = 60/61, so cos Ф =60/61
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