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Summersnow8

  • 2 years ago

Use fundamental identities to find exact values of the remaining trig functions given that sec x=11/9 , tan x < 0?

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  1. AravindG
    • 2 years ago
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    sec x=11/9 so both sec x and cos x are positive

  2. AravindG
    • 2 years ago
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    tan x<0 means sin x<0 from above observation

  3. AravindG
    • 2 years ago
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    Hence the angle lies in 4th quadrant

  4. AravindG
    • 2 years ago
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    Now just use the right triangle and find all other trigonometric ratios. Don't forget to put correct sign according to 4th quadrant.

  5. Summersnow8
    • 2 years ago
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    I tired doing that, but it wasn't correct. I found cosine x = 9/11, but the others I cant find

  6. AravindG
    • 2 years ago
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    |dw:1372184147001:dw|

  7. AravindG
    • 2 years ago
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    Use the triangle :)

  8. Summersnow8
    • 2 years ago
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    hmmm. okay

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