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Question Number 126700 by Eric002 last updated on 23/Dec/20
θ=sin−1(25)findcos(θ)andtan(θ)
Answered by akornes last updated on 23/Dec/20
cosθ=±215andtanθ=±22121
Commented by MJS_new last updated on 23/Dec/20
howcanthecosandtanofanangleinthefirstquadrantbe<0???
Answered by MJS_new last updated on 23/Dec/20
θ=sin−125⇒θ≈23.58°⇒cosθ=1−(25)2=215;tanθ=251−(25)2=22121
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