LIVingproofwlavender LIVingproofwlavender

12-12-2019
Mathematics

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kenlingdad kenlingdad

12-12-2019

Answer:

(√6 - √2) / 4

Step-by-step explanation:

cos(x+y) = cosx siny - sinx cosy

cos(75°) = cos(30°+45°) = cos30° sin45° -sin30°cos45°

= √3/2 * √2/2 - 1/2 * √2/2

=(√6 - √2) / 4

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