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Sample ICSE Maths Trigonometry Questions free

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abhas
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PostSubject: Sample ICSE Maths Trigonometry Questions free Sat Jan 26, 2008 9:37 pm




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Abhinav




PostSubject: Re: Sample ICSE Maths Trigonometry Questions free Wed Feb 13, 2008 3:18 pm

1.)

→sin∂ (1-2sin2∂)/

cos∂(2cos2∂-1)

→sin∂(cos2∂-sin2∂)/

cos∂(cos2∂-sin2∂)

→sin∂/

cos∂

→tan∂
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Abhinav




PostSubject: Re: Sample ICSE Maths Trigonometry Questions free Wed Feb 13, 2008 3:27 pm

LHS

cos2∂( cos2∂-1)

cos2∂(-sin2∂)

-cos2∂sin2

RHS

sin2∂(sin2∂-1)

sin2∂(-cos2∂)

-cos2∂sin2

Hence Proved
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