Question

if sin2A=cos3A then find sin5A
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Answer 1

Answer:

sin5A = 1

Step-by-step explanation:

we have,

sinX = cos(90-X);

here,

sin2A=cos3A;

==>> 3A = (90 - 2A)

3A + 2A = 90    

      5A  =  90  ------(1)

We know,

sin90 = 1     --------------(2)

so,

from 1 & 2

sin5A = 1

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