Find Angle A Only For Maths Buffs

Discussion in 'Online Games & Puzzles' started by Thyagarajan, Apr 15, 2023.

  1. Apr 15, 2023 #1
    Thyagarajan

    Thyagarajan IL Hall of Fame

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    FIND
    ANGLE A
    (ONLY FOR MATHS BUFFS)
    upload_2023-4-15_9-19-5.jpeg
    FINDING ANGLE A IS EASY!
    Could you pl try?


    ​
    Tagging @hrastro
     
    Last edited: Apr 15, 2023
    Thyagarajan, Apr 15, 2023
    Thyagarajan, Apr 15, 2023
    #1
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  2. Apr 16, 2023 #2
    gamma50g

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    33.69 degrees?
     
    gamma50g, Apr 16, 2023
    gamma50g, Apr 16, 2023
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  3. Apr 16, 2023 #3
    Thyagarajan

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    Thanks for putting your ans in Spoiler. Could you pl put your working in spoiler?
    Regards. God Bless
     
    Thyagarajan, Apr 16, 2023
    Thyagarajan, Apr 16, 2023
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  4. Apr 16, 2023 #4
    gamma50g

    gamma50g Gold IL'ite

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    Sorry the correct ans should be 35.07 degrees. This is because sin 45 =1/2. So a perpendicular line drawn from angle B to the base is 4. Now sin A is 4/7. So sin inverse would be 35.07 degrees.
     
    gamma50g, Apr 16, 2023
    gamma50g, Apr 16, 2023
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  5. Apr 16, 2023 #5
    Thyagarajan

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    .
    8cos45° + 7cos A° = 10

    7Cos A° = 10 - 8 Cos 45°

    Cos A° = 1/7 of [10 - 8 x 0.7071]

    = 1/7 of [10 - 5.656]

    = 1/7 of (4. 35)

    A° = cos inverse of 0. 621428

    = 51.58°
     
    Thyagarajan, Apr 16, 2023
    Thyagarajan, Apr 16, 2023
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  6. Apr 18, 2023 #6
    Thyagarajan

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    upload_2023-4-18_11-27-2.jpeg
    upload_2023-4-18_11-28-50.jpeg
     
    Thyagarajan, Apr 18, 2023
    Thyagarajan, Apr 18, 2023
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