Question

If sina=3/5and a is in the first quadrant then find sin 2a
​

Answer 1

Answer:

approach use formula SIN2A

Step-by-step explanation:

SIN2A IS 2SinAcosA

sinA =3/5 ---- 1point

CosA= 4/5 ----2point

SUBSTITUTE IN SIN2A ( REMEMBER IT IS IN QUADRANT 1 , THEREFORE ALL POSITIVE)

ANSWER IS 2 × 3/5 × 4/5

24/25