cbyearty2460 cbyearty2460

09-03-2018
Mathematics

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WRITE IN SIMPLEST FORM : COS INVERSE( 3/5 COS X + 4/5 SIN X ),

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Kalahira Kalahira

17-03-2018

Let Cos Y = 3/5 sin Y = 4/5 We know. cosYcosX+sinXsinY = cos (X-Y) COS INVERSE( 3/5 COS X + 4/5 SIN X ) = COS INVERSE( cosYcosX+sinXsinY) = COS INVERSE(cos (X-Y) = X-Y = X- cos inverse 3/5 = X - 57degrees

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