
Abbi F.
asked 10/10/21Verify that the equation is an identity. Show that (cosθ)/(secθtanθ) = 1+(sinθ). Please show all steps and the rules that apply to them.
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1 Expert Answer
Mark M. answered 10/11/21
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Retired math prof. Very extensive Precalculus tutoring experience.
As written, the equation is NOT an identity.
For example, when θ = 45°, the left hand side is equal to (1/√2) / (√2) = 1/2, but the right hand side is equal to 1 + 1/√2.
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Daniel B.
10/11/21