anonymous
  • anonymous
Given that sin pie/6 = 1/2, use an equivalent trigonometric expression to show that cos= 1/2. I have no clue how to do this, can someone help me?
Mathematics
schrodinger
  • schrodinger
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anonymous
  • anonymous
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anonymous
  • anonymous
@sabika13
anonymous
  • anonymous
sin 30*=1/2 cos60*=1/2 u can see trignometric table for this and all for all values also

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anonymous
  • anonymous
i dont understand.. can you do it step by step
anonymous
  • anonymous
If cos x = 1/2 then x = cos^(-1) (1/2) therefore, x = 60 degrees , 300 degrees {where x is greater than or equal to 0 and lesser than or equal to 360} or pi/3 radians, 5pi/3 radians {where x is greater than or equal to 0 and lesser than or equal to 2pi}
anonymous
  • anonymous
okay.. so we do not need to use trigonometric identities?
anonymous
  • anonymous
the trig identities chart*
anonymous
  • anonymous
is it ok?now or not?
anonymous
  • anonymous
i think its okay.. i basically just solve sinx and cosx?
anonymous
  • anonymous
which grade r u in?
anonymous
  • anonymous
122
anonymous
  • anonymous
sorry 12*
anonymous
  • anonymous
o Zbrdst
anonymous
  • anonymous
thank u for yourhelp.

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