7. Prove that:
(i) tan 20° tan 35° tan 45º tan 55° tan 70° = 1
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Answered by
1
Answer:
Step-by-step explanation:
tan 20° tan 35° tan 45º tan 55° tan 70°
= tan 20° tan 35° tan 45º cot 35 cot 20
= tan 45 = 1
LHS = RHS
Answered by
0
Answer:
Step-by-step explanation:
tan 20° tan 35° tan 45º tan 55° tan 70°
tan 20° tan 35° tan 45º cot 35° cot 20°
tan 20°cot 20° tan 35° cot 35° tan 45º
1 x 1 x 1 Note : Tan A x Cot A =1 , Tan 45 =1
=1
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