सिद्ध करे : cos^4 (pi/8) + cos^4 ((3pi)...

सिद्ध करे : `cos^4 (pi/8) + cos^4 ((3pi)/8) + cos^4 ((5pi)/8) + cos^4( (7pi)/8) = 3/2`

सिद्ध करे : cos^4 (pi/8) + cos^4 ((3pi)/8) + cos^4 ((5pi)/8) + cos^4(...
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Prove that cos^(4)pi/8+cos^(4)(3pi)/(8)+cos^(4)(5pi)/8+cos^(4)(7pi)/...
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Show that cos^4""pi/8+cos^4""(3pi)/8+cos^4""(5pi)/8+cos^4""(7pi)/8=3/2
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साबित करें कि cos^(4) . ( pi)/(8) + cos^(4) . ( 3pi)/( 8) + cos^(4...
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মান নির্ণয় করো cos^4 ((pi)/8)+cos^4 ((3pi)/8)+ cos^4 ((5pi)/8)+ cos^4...
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cos^(4) (pi/8) + cos^(4) ((3pi)/8) + cos^(4) ((5pi)/8) + cos^(4) ((7pi...
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cos^(4).(pi)/(8)+cos^(4).(3pi)/(8)+cos^(4).(5pi)/(8)+cos^(4).(7pi)/(8)...
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cos^4(pi/8)+cos^4((3pi)/8)+cos^4((5pi)/8)+cos^4((7pi)/8)=
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Prove that: cos^4pi/8+cos^4(3pi)/8+cos^4(5pi)/8+cos^4(7pi)/8=3/2
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