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KIKI
KIKI asked in Science & MathematicsMathematics · 1 month ago

Trigonometry question ?

If cos θ=0.345 what is the value of sin(90°-θ)?

3 Answers

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  • ?
    Lv 7
    1 month ago

    cos θ = 0.345, sin(90°- θ) = cos θ = 0.345

  • ?
    Lv 7
    1 month ago

    θ and 90 - θ are complement angles, thus...? [think of a right triangle].

    Or, use sin(a+b) = sinacosb +cosasinb, with a = 90 & b = θ.

    Did you find your answer by using both techniques?

  • Alan
    Lv 7
    1 month ago

    cos θ=  sin(90°-θ)

    so 

    sin(90°-θ) = 0.345

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