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KIKI
KIKI asked in Science & MathematicsMathematics · 2 months ago

Trigonometry Question?

Suppose cos β=B for an angle in the first quadrant.

How could you find another angle y where cos y=β

How could you find another angle δ where δ=-B

i’m not talking a test but my teacher just didn’t explain this well

Update:

wait i made a typo

Update 2:

never mind no i didn’t

2 Answers

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  • az_lender
    Lv 7
    2 months ago

    cos(-beta) = B

    and 

    cos(pi-beta) = -B.

  • Daniel H
    Lv 5
    2 months ago

    Maybe you aren't either

    cosβ = B lies in quadrant one, however since cos y=β

    β can only be a value from 0 to 1 and B resides in [0.5403, 1]

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