Question

Find the value of A when COS2A=SIN3A ?

Answer 1

Answer: A=18

Step-by-step explanation:

Given: COS2A= SIN3A

To find:  the value of A.

        = COS2A=SIN3A

        =SIN(90-2A)=SIN3A  [ Using formula cos $\alpha$ = sin( 90-$\alpha$) we can write cos2A = sin(90-2A)]

       90-2A =3A [ SIN got cancelled from both side]

         90= 3A +2A [ negative sign become positive when it will go to opposite side]

         90=5A

          90/5=A

           18=A

#SPJ3

   

Answer 2

Answer:

A=18

Step-by-step explanation:

WE GET ANSWER BY CANCELLATION