Question

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

Answer 1

tan (325 - 86) = tan 239

Explanation:

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`