Question

Find a value of A when cos 2A = sin 3A​

Answer 1

Answer:

A is 18 degrees

Step-by-step explanation:

cos2A=sin3A

=>sin(90-2A)=sin3A

=>90-2A=3A

=>5A=90

=>A=18

Answer 2

ANSWER:

A= 18⁰

EXPLANATION :

cos 2A = sin 3A ( :cos 2A = sin(90⁰-2A)

sin (90⁰-2A)= sin 3A ( sin get cancelled)

90⁰- 2A = 3A

90⁰ = 3A+2A

90⁰= 5A

90⁰/5 = A

18⁰ = A

: A = 18⁰