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Find the altitude of an isosceles triangle whose base in 30 cm vertex angle is 75 degres

  • trig -

    draw the altitude,
    I see a right-angled triangle with base 15 and base angle of 52.5°
    Call the height h
    h/15 = tan 52.5
    h = 15tan 52.5
    = ....

    I will let you do the button-pushing.

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