Math, asked by talukdarheman1, 8 months ago

(vii)
cot 54° tan 20°
+
tan 36°cot 70°
-2

Answers

Answered by mansipandey2905

1

Step-by-step explanation:

cot ∅ = tan(90-∅)

so, cot 54° tan 20° + tan 36°cot 70° -2

= cot ( 90- 54) tan (90-20) + tan 36°cot 70° -2

= tan 36° cot 70° + tan 36° cot 70° -2

= 2( tan 36° cot 70°) -2

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