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AWR cloud height

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  • AWR cloud height

    Hello people...

    could someone help me with this question please. thanks!!
    The airborne weather radar is using a 5° beam. A cloud is detected at a range of 60 miles. If the scanner is tilted up to 5° the cloud echo disappears. Using the tangent formula to determinate the height of the top of the cloud, in relation to the aeroplanes cruising level and select the nearest answer from the following:
    A 15.900 ft above the level.
    B 31.900 ft above the level.
    C 15.900 ft below the level.
    D 31.900 ft below the level.
    I donīt get what kind of tilt I should use. and can someone tell me the tangent formula ?