If Tan A 2/3 prove that sin 2 A+ Cos 2A =1
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Answer:
Tan A =2/3
Sin A =2/√13
Cos A =3/√13 according to pyth. Theorem
Sin 2A = 2 sinA cosA = 2*2/√13*3√13
== 12/13
=cos^2 A+ sin^2 A
= (3/√13)^2+(2/√13)^2
= 9/13+4/13
=13/13
=1
Step-by-step explanation:
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