Question

If Sin(2a)=cos(3a) then find out the value of a

Answer 1

write cos(3a) as sin(90-3a) and take sin inverse both sides.. which leads to give eqn. 5a =90 a=18° 0r pi/10

Answer 2

Answer:

$Value\: of \: A = 18$

Step-by-step explanation:

$sin(2A)=cos(3A)$

$\implies sin(2A)=sin(90-3A)$

$\implies 2A = 90-3A$

$\implies 2A+3A=90$

$\implies 5A=90$

$\implies A= \frac{90}{5}$

$\implies A=18$

Therefore,

$Value\: of \: A = 18$

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