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Math Help - basic math question

  1. #1
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    basic math question

    What is the sin225 degrees + tan45 degrees?

    What I did was:
    sin(180+45) which would be 0 and the square root of 2/2 respectively.
    Then the tan of 45 is 1...

    When I tried to solve for it I got squareroot of 2/2 + 1. This was not given as any of the four answer choices so I suppose it is wrong... what is the answer?
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  2. #2
    Rhymes with Orange Chris L T521's Avatar
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    Quote Originally Posted by ceroseven View Post
    What is the sin225 degrees + tan45 degrees?

    What I did was:
    sin(180+45) which would be 0 and the square root of 2/2 respectively.
    Then the tan of 45 is 1...

    When I tried to solve for it I got squareroot of 2/2 + 1. This was not given as any of the four answer choices so I suppose it is wrong... what is the answer?
    sin(225) is a negative value...so how would you correct your answer?
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  3. #3
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    Alright.. So would this mean that the answer is negative square root of 2 + 1?
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  4. #4
    Rhymes with Orange Chris L T521's Avatar
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    Quote Originally Posted by ceroseven View Post
    Alright.. So would this mean that the answer is negative square root of 2 + 1?
    1-\frac{\sqrt{2}}{2} is correct (I put it in a different form, but its the same thing).
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