solve trigonometric equation for θ with 0 ≤ θ < 2 π

Algebra
Tutor: None Selected Time limit: 1 Day

tan^2(θ)-sec^2(θ)=cos(-θ) 

Jun 4th, 2015

Thank you for the opportunity to help you with your question!

tan^2(θ)-sec^2(θ)=cos(-θ) 

-1=cos(θ)

tan^2(θ)-1-tan^2(θ)=cos(-θ)

-1=cos(-θ)

-1=cos(θ)

reference for rules I used:



http://www.sosmath.com/trig/Trig5/trig5/trig5.html


Please let me know if you need any clarification. I'm always happy to answer your questions.
Jun 4th, 2015

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