Jane uses 42 cups of dog food each week to feed her dog. Which number sentence should be used to find N the number of cups Jane
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Here's the sum rule for the tangent function:
In the special case a=b, this becomes the double angle formula:
In your case, you case use the sum rule once:
And use it again, in the special case of the double angle:
We can obvisouly simplify this expression a lot: let's deal with the numerator and denominator separately: the numerator is
and the denominator is
So, the fraction is