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Tan 2A=cot(A-18°) where 2A is an …

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Tan 2A=cot(A-18°) where 2A is an acute angle ,find the value of A

Posted by Ahmar Madani 6 years, 3 months ago

CBSE > Class 10 > Mathematics

2 answers

Sia ? 6 years, 3 months ago

We have, tan 2A = cot (A - 18°)
{tex}\Rightarrow{/tex} tan 2A = tan {90° -(A -18°)}
{tex}\Rightarrow{/tex} tan 2A = tan (108° - A)
{tex}\Rightarrow{/tex} 2A = 108° - A
{tex}\Rightarrow{/tex} 3A = 108°
{tex}\Rightarrow{/tex} A = 36°

2Thank You

Ahmar Madani 6 years, 3 months ago

Thank you so much

0Thank You

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CBSE > Class 10 > Mathematics