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Prove that: (cos^2 33^@-cos^2 57^)/(sin(...

Prove that: `(cos^2 33^@-cos^2 57^)/(sin(21)^@-cos(21))=-1/sqrt(2)`

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To prove that \[ \frac{\cos^2 33^\circ - \cos^2 57^\circ}{\sin^2 21^\circ - \cos^2 21^\circ} = -\frac{1}{\sqrt{2}}, \] we will use trigonometric identities and simplifications step by step. ...
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  3. Prove that: (cos^2 33^@-cos^2 57^)/(sin(21)^@-cos(21))=-1/sqrt(2)

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  9. If sinA=4/5a n dcosB=5/(13),\ w h e r e\ 0<A ,\ B<pi/2 , find the valu...

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  10. If sinA=4/5a n dcosB=5/(13),\ w h e r e\ 0<A ,\ B<pi/2 , find the valu...

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  11. If sinA=4/5a n dcosB=5/(13),\ w h e r e\ 0<A ,\ B<pi/2 , find the valu...

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  15. If cosA=4/5 and cos B=12/13 where and (3pi)/2 < B < A < 2pi then f...

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  16. If cosA=4/5 and cos B=12/13 where (3pi)/2 < B < A < 2pi then find c...

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  17. If tanA=3/4,cosB=9/(41), w h e r e\ pi<A<(3pi)/2a n d\ 0<B<pi/2 , find...

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  18. If sinA=1/2,cosB=(12)/(13), w h e r e pi/2ltaltpia n="" d(3pi)="" 2ltb...

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  19. If sinA=1/2,cosB=(sqrt(3))/2,\ w h e r e\ pi/2<A<pi\ a n d\ 0<B<pi/2 ,...

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  20. If sinA=1/2,cosB=(sqrt(3))/2, w here pi/2 lt A lt pi and 0ltBltpi/2 f...

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