Question

It a=4 b=5 and sinA=4/5 find m<B ie B?
mathes question ​

Answer 1

Answer:

here is ur answer hope you have been understood

Answer 2

Answer:

sinA=4/5

sin²A+cos²A=1

(4/5)²+cos²A=1

cos²A=1-16/25

cos²A=25-16/25

cos²A=9/25

cosA=3/5

cos(A-B/2)=(3/5-5/13/2)

=39-25/65/2

=14/65/2

=14×2/65

=28/65