anonymous
  • anonymous
simple trig problem help! simplify the following.. cos(7π/126º)cos(36º/5)+sin(7π/126º)sin(36º/5)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
cos(7pi/ 126 - 36pi/5) . cosine formula !!!!
anonymous
  • anonymous
i'm not exactly following...
anonymous
  • anonymous
cosA cosB + sinA sinB = cos (A-B)

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anonymous
  • anonymous
then shouldn't it be cos(7π/126º-36º/5) ? you had put B=36π/5...
anonymous
  • anonymous
sry...typed wrongly...my bad
anonymous
  • anonymous
but
anonymous
  • anonymous
the angle must be in DEGREES or RADIANS.,,,u can NOT use both
anonymous
  • anonymous
so then my answer would be correct so long as i take away the degrees sign?

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