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show that (1-sin^2 alpha)(1-cos^2 alpha)...

show that `(1-sin^2 alpha)(1-cos^2 alpha)(1+cot^2 alpha)(1+tan^2 alpha)`= 1.

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UNITED BOOK HOUSE-GARDEN REACH BIHARI DAS GIRL'S -EXERCISE
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  11. If (sin theta) (x) = (cos theta)/(y), then prove that sin theta - cos ...

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  12. show that (1-sin^2 alpha)(1-cos^2 alpha)(1+cot^2 alpha)(1+tan^2 alpha)...

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  13. The heights of two towers are h1 metre and h2 metre. If the angle of e...

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