Question and Answers Forum

All Questions      Topic List

Algebra Questions

Previous in All Question      Next in All Question      

Previous in Algebra      Next in Algebra      

Question Number 126700 by Eric002 last updated on 23/Dec/20

θ=sin^(−1) ((2/5)) find cos(θ) and tan(θ)

θ=sin1(25)findcos(θ)andtan(θ)

Answered by akornes last updated on 23/Dec/20

cosθ=±((√(21))/5) and tanθ=±((2(√(21)))/(21))

cosθ=±215andtanθ=±22121

Commented by MJS_new last updated on 23/Dec/20

how can the cos and tan of an angle in the  first quadrant be <0???

howcanthecosandtanofanangleinthefirstquadrantbe<0???

Answered by MJS_new last updated on 23/Dec/20

θ=sin^(−1)  (2/5) ⇒ θ≈23.58°  ⇒ cos θ =(√(1−((2/5))^2 ))=((√(21))/5); tan θ =((2/5)/( (√(1−((2/5))^2 ))))=((2(√(21)))/(21))

θ=sin125θ23.58°cosθ=1(25)2=215;tanθ=251(25)2=22121

Terms of Service

Privacy Policy

Contact: info@tinkutara.com