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If tan4A = cot(A-20^@),0^@ < theta< 90^@...

If `tan4A = cot(A-20^@),0^@ < theta< 90^@`, then the value of A is:
यदि `tan4A = cot(A-20^@),0^@ < theta< 90^@`, A का मान क्या होगा ?

A

`22^@`

B

`80^@`

C

`5^@`

D

`14^@`

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PINNACLE-TRIGONOMETRY-EXERCISE
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