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MANOHAR RAY-त्रिकोणमितीय फलन -प्रश्नावली 3(F)
- cos 3 theta -cos 7 theta का मान ज्ञात कीजिए ।
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- sin 75^(@) +sin 15^(@) =(sqrt(6))/(2)
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- (sin 75^(@) –sin 15^(@))/(cos 75^(@) +cos 15^(@) ) =(1)/(sqrt(3))
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- (a) sin 2x + 2 sin 4x + sin 6x = 4 cos^(2) x sin 4x (b) cot 4x (sin...
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- (sin 5x+ sin 3x)/(cos 5x +cos 3x) = tan 4x
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- (sin A +2 sin 3A + sin 5A )/(sin 3A +2 sin 5A + sin 7A) =(sin 3A)/(si...
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- (sin x+ sin 3x)/(cos x + cos 3x) + tan 2x
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- (sin A+ sin 3A + sin 5A)/(cos A+ cos 3A + cos 5A) =tan 3A
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- (cos 4x +cos 3x + cos 2x)/(sin 4x + sin 3x +sin 2x) = cot 3x
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- (sin A +sin 3A +sin 5A +sin 7A)/(cos A +cos 3A + cos 5A +cos 7A) =tan ...
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- (cos (pi+x)cos (-x))/(sin (pi-x) cos ((pi)/(2)+x)) =cot^(2)x
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- (sin .(5pi)/(12)-sin.(pi)/(12))/(cos.(5pi)/(12)+cos .(pi)/(12) ) = (1)...
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- (cos 9x –cos 5x)/(sin 17x –sin 3x) =(sin 2x)/(cos 10x)
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- (sin x + sin y)/(cos x+ cos y) = tan ((x+y)/2)
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- (sin x- sin 3x)/(sin^(2) x-cos^(2)x) =2 sin x
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- cos.((3pi)/(4)+x) –cos ((3pi)/(4)-x) =-sqrt(2) sin x
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