Question

If tan@=1/7 and tan$=1/3 Than show that cos2@=sin4@
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Answer 1

Step-by-step explanation:

suppose for 1 minute

cos(2@)=sin(4@)=sin [2(2@)]=2sin(2@)cos(2@)

cancel......

1= 2sin (2@)

1/2= sin(2@)

how can constant be equal to something which varies??

so not possible

Answer 2

Answer:

suppose for 1 minute

cos(2@)=sin(4@)=sin [2(2@)]=2sin(2@)cos(2@)

cancel......

1= 2sin (2@)

1/2= sin(2@)

how can constant be equal to something which varies??

so not possible