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RD SHARMA-TRANSFORMATION FORMULAE-Solved Examples And Exercises
- Prove that: \ sin 50^0+sin 10^0=cos 20^0
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- Prove that: sin 105^@+cos 105^@=cos 45^@
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- Prove that: cos 100^0+cos 20^0=cos 40^0
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- Prove that: sin 23^0+sin 37^0=cos7^0
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- Prove that: sin 40^0+sin 20^0=cos10^0
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- Prove that: cos 55^0+cos 65^0+cos 175^0=0
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- Prove that: cos 80^0+cos 40^0-cos 20^0=0
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- Prove that: sin 80^0-cos 70^0=cos 50^0
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- sin((5pi)/18)-cos((4pi)/9)=sqrt(3)sin(pi/9)
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- Prove that: sin 50^0-sin 70^0+sin 10^0=0
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- Prove that: cos 20^0+cos 100^0+cos 140^0=-0
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- cospi/12-sinpi/12=1/(sqrt(2))
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- Prove that : sin 51^0+cos 81^0=cos 21^0
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- Prove that: cos((3pi)/4+x)-cos((3pi)/4-x)=-sqrt(2)sinx
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- Prove that: cos(pi/4+x)+cos(pi/4-x)=sqrt(2)\ cos x
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- Prove that: sin 65^0+cos 65^0=sqrt(2)cos 20^0
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- Prove that: sin 47^0+cos 77^0=cos 17^0
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- Prove that: cos3A+cos5A+cos7A+cos 15 A=4cos4A cos5A cos6A
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- Prove that: \ cos A+cos3A+cos5A+cos7A=4cos A cos2A cos4A
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- Prove that sinA+sin2A+sin4A+sin5A=4 (cosA/2)(cos3A/2)sin3A
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