anonymous
  • anonymous
Solve cos(20-30). Help, please.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
cos 20 . cos30 +sin20.sin30
anonymous
  • anonymous
I took cos(20-30) from that identity. Can it not be simplified anymore?
anonymous
  • anonymous
it is the simplest form (As i know) u can type it on the calculator & get the result

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anonymous
  • anonymous
Yeah, but I need radical form. Thank you.
phi
  • phi
what is wrong with cos(-10), which is simply cos(10)?

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