trig Identities 8

Mathematics
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Find the exact value for   cos(75)

Dec 17th, 2014

square route of 6-square route of 2/4

cos(75) 

= cos(45 + 30) 

= cos(45)cos(30) - sin(45)sin(30) 

= (1/√2)(√3/2) - (1/√2)(1/2) 

= 2/4(√6 - √2)

choose me best in all that i answer the other 

thanks

Dec 17th, 2014

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