Find the value of tan 225- 405-tan765- 675-

tan 225^∘ 405^∘+tan765^∘ 675^∘ ⇒ nbsp;tan ( 180^∘+45^∘ ) ( 360^∘+45^∘ )+tan ( 720^∘ +45^∘ ) ( 630^∘+45∘ ) ⇒tan 45^∘ 45^∘ + tan 45^∘ ( tan 45^∘) ...

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Sin(A+B)Sin(A-B)

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Question

Find the value of $tan 225^{\circ} cot 405^{\circ} + tan 765^{\circ} cot 675^{\circ}$

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Show that tan225°.cot405°+tan675°.cot315°=2

Find the value of $s i n 210^{\circ} + c o s 120^{\circ} + t a n 225^{\circ} + c o t 315^{\circ} + s e c 300^{\circ} + c o s e c 150^{\circ}$ .

tan 225^{\circ} + cot 135^{\circ}

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