Math, asked by classicassociates72, 10 months ago

sinA =3/5, A in first quadrant

, sin2A=_____​

Answers

Answered by desusmita442
1

sin 2a = 2*sin a* cos a. => 2* 3/5* 4/5. => 24/25 or -24/25 base on the angle a [ The value of sin 2a can be 24/25 or -24/25 based on which quadrant a is in ]

Answered by sai172982
1

Step-by-step explanation:

sin2A=2.sinA.cosA

here sinA=3/5

so,

opp. side of angle A is 3k units

hyp. side of angle A is 5k units

by pythogoras thm adj side to angle A is 4k units

(√(5k)^2-(3k)^2= 4k)

so cosA=4k/5k=4/5

Therefore

sin2A=2.3/5.4/5

sin2A=24/25

hope this helps u!

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