Question
In Problems $37-54,$ use Fundamental Identities and/or the Complementary Angle Theorem to find the exact value of each expression. Do not use a calculator.$$\tan 12^{\circ}-\cot 78^{\circ}$$
Step 1
So we can rewrite $\tan(12^{\circ})$ as $\cot(90^{\circ}-12^{\circ})$. Show more…
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