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Verified answer
TriGonoMetRisin A = 3/5
A lancip
cos A = √(1 - sin² A) = 4/5
sin 2A
= 2 sin A cos A
= 2 . 3/5 . 4/5
= 24/25 ✔
cos 2A
= cos² A - sin² A
= (16 - 9)/25
= 7/25 ✔
tan 2A
= sin 2A / cos 2A
= 24/25 × 25/7
= 24/7 ✔
b) cos 2A= 7/25
c) tan 2A = 24/7