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    • Thread Starter

    The question wants me to find the angle between 90 and 360 when cosx = 2/3 but the calculator gives me 48.2 when I do the inverse of cos, however that is not between 90 and 360.

    I realise that there is more than one value, but I have forgotten what to add to 48.2 to find the other value? E.g 90, 180 etc

    Also what would I add if it was sin or tan?

    Add 90 I think

    Posted from TSR Mobile

    No hang on, sin is 90, for cos I would do 360 minus the angle you found... I think tan is add 180

    Posted from TSR Mobile
    • Thread Starter

    (Original post by rayofsunshine98)
    No hang on, sin is 90, for cos I would do 360 minus the angle you found... I think tan is add 180

    Posted from TSR Mobile
    Ok cheers
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