Asked by Shelbie
How do i find the exact value for:
(cos5pi/16)(cospi/16)+ (sin5pi/16)(sinpi/16)
(cos5pi/16)(cospi/16)+ (sin5pi/16)(sinpi/16)
Answers
Answered by
Steve
cosAcosB + sinAsinB = cos(A-B)
so, what is 5π/16 - π/16?
so, what is 5π/16 - π/16?
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