यदि tan A = 12/5 और pi lt A lt (3pi)...

यदि `tan A = 12/5` और ` pi lt A lt (3pi)/2 ` , तो अग्रलिखित के मान ज्ञात कीजिए -
(i) sin 2A (ii) cos 2A (iii) tan 2A

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