1.

Prove that: (i)cos11∘+sin11∘cos11∘−sin11∘=tan56∘ (ii)cos9∘+sin9∘cos9∘−sin9∘=tan54∘ (iii)cos8∘−sin8∘cos8∘+sin8∘=tan37∘

Answer»

Prove that:
(i)cos11∘+sin11∘cos11∘−sin11∘=tan56∘
(ii)cos9∘+sin9∘cos9∘−sin9∘=tan54∘
(iii)cos8∘−sin8∘cos8∘+sin8∘=tan37∘



Discussion

No Comment Found