If Sint A -C02A = COSYA - Sinza and...
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If Sint A -C02A = COSYA - Sinza and OLALI 4 then find the value of tan 4 A

JEE/Engineering Exams
Maths
Solution
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( sin 4 a-cos 2 a=cos 4 a-sin 2 a ) ( sin 4 a+sin 2 a=cos 4 a+cos 2 a ) ( 2 sin 3 a cos a=2 cos 3 a cos a ) ( sin 3 a / cos 3 a=1 ) ( >tan 3 a=1 ) ( tan 3 a=tan 45 ) ( 3 a=45 ) ( a=15 ) Then Tan ( 4 a=tan 4 times 15=tan 60=sqrt{3} )
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