How do you write the expression $(tan325^circ-tan86^circ)/(1+tan325^circtan86^circ)$ as the sine, cosine, or tangent of an angle?

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Answer 1 · 2017-01-16T03:40:15

tan (325 - 86) = tan 239

Apply the trig identity:
$tan (a - b) = (tan a - tan b)/( 1 + tan a.tan b)$
$(tan 325 - tan 86)/(1 + tan 325.tan 86) = tan (325 - 86) = tan 239$

How do you write the expression (tan325^circ-tan86^circ)/(1+tan325^circtan86^circ)(tan325^circ-tan86^circ)/(1+tan325^circtan86^circ) as the sine, cosine, or tangent of an angle?