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find the exact value of [sec(-30 degrees)- cot 120 degrees]/1-cosec^2(45 degrees)


Find the exact value of [sin^2(355 degrees) + cos^2 (355 degrees)]/ tan^2 (30 degrees)

  • math -

    sin^2 + cos^2 = 1, so you have

    1/tan^2(30) = 1/3

    for the other, plug in the values. recall that 1-csc^2 = -cot^2, so the bottom is just -1

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