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Homework Statement
Simplify and write the trigonometric expression in terms of sine and cosine:
(sec (t) - cos (t))/sec (t) = (f(t))^2
Homework Equations
sec (t)=1/cos (t)
The Attempt at a Solution
(sec (t) - cos (t))/sec (t)
= ((1/cos (t))-cos(t)) / (1/cos (t))
= ((1-cos^2(t))/cos(t)) / (1/cos (t))
From here, can I take the entire numerator, ((1-cos^2(t))/cos(t)), and divide it by one? This way I can do division of two rational numbers to get:
= cos(t)*((1-cos^2(t))/cos(t))
=1-cos^2(t) = sin^2(t) = (f(t))^2
so f(t)=sin (t)
I am quite sure this is the right answer, but I am wondering if the method I used is correct math. Thanks for your help everyone.