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Show that: sn10^@+sin20^@+sin40^@+sin50^...

Show that:
`sn10^@+sin20^@+sin40^@+sin50^@=sin70^@+sin80^@`

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Prove the following : sin 10^@ + sin 20^@ + sin 40^@ + sin 50^@ = sin 70^@+ sin 80^@ .

Prove that : sin 12^@ sin48^@ sin 54^@=1/8 .

Prove that : sin 10^@ sin 50^@ sin 60^@sin 70^@= sqrt3/16 .

Show that : cos38^@cos52^@-sin38^@sin52^@=0 .

Show that : cos 38^@ cos 52^@-sin 38^@ sin 52^@ = 0

Prove the following : sin 20^@ sin 40^@ sin 60^@ sin 80^@ = 3/16 .

Prove that : cos 130^@ cos 40^@+ sin 130^@ sin 40^@= 0 .

Prove the following : sin 10^@ sin 30^@ sin 50^@ sin 70^@ = 1/16 .

Prove that : sin 6^@ sin 42^@ sin 66^@ sin 78^@ =1/16 .

Show that |(sin10^@ , - cos10^@),(sin80^@, cos80^@)| = 1

JBD PUBLICATION-TRIGNOMETRIC FUNCTIONS-EXAMPLE
  1. Prove the following:sin(150^@+x)+sin(150^@-x)=cosx

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  2. Prove that sin51^(@)+cos81^(@)=cos21^(@) .

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  3. Show that: sn10^@+sin20^@+sin40^@+sin50^@=sin70^@+sin80^@

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  4. Find the principal solutions (0 le x le 2pi) of the following euqtions...

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  5. Find the principal solutions (0 le x le 2pi) of the following euqtions...

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  6. Find the principal and general solutions of the following equation:- t...

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  7. Find the principal and general solutions of the following equation:- s...

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  8. Find the general solution of the following equations: cos 4 x = cos 2x

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  9. Find the general solutions of the equations sinx+sin3x+sin5x=0.

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  10. Find the general solution of the following equations: cos 4 x = cos 2x

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  11. An athlete runs 4 times around a circular running a path to describe 1...

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  12. Prove that: cot^2frac (pi)(6)+cosecfrac (5pi)(6)+3tan^2frac (pi)(6)=6

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  13. In triangleABC, prove that cos(A+B)+cosC=0

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  14. In triangleABC, prove that cos((A+B)/(2))=sinC/2

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  15. Prove the following: cos((3pi)/2+x)cos(2pi+x)[cot((3pi)/2-x)+cot(2pi+x...

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  16. If tan alpha= (m)/(m+1) and tan beta=(1)/(2m+1), the find the value o...

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  17. If tan(alpha+theta)=ntan(alpha-theta), show that:(n+1)sin 2theta=(n-1)...

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  18. Prove that:(1+sin2x-cos2x)/(1+sin2x+cos2x)=tanx

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  19. Show that sqrt(2+sqrt(2+sqrt(2+2cos 8)))=2cos theta

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  20. Find sinfrac(x)(2), cosfrac(x)(2) and tanfrac(x)(2) in the following:-...

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