trig

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How can I find the exact value of 4cos(7ð/4)-2sin(ð/3)?

  • trig -

    In a graphic calculator punch in cos(7/4) and should give you the right answer
    subtract it from sin(0/3)
    and tada!

  • trig -

    the weird symbol is suppose to be pi (3.14...) not a zero. it got messed up after submitting the question

  • trig -

    need to show my work

  • trig -

    4cos(7π/4)-2sin(π/3)
    = 4 cos (π/4) - 2 sin(π/3)
    = 4(√2/2) - 2(√3/2)
    = (4√2 - 2√3)/2

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