Exercise 8.2 Trigonometric ratios of some specific angles

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Given tanA=4/3 , find the other trigonometric ratios of the angle A.

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If sintheta=1/(sqrt(2)) , find all other trigonometric ratios of angle theta .

Which trigonometric ratios are positive for the following angles (i) 210^@ (ii) -135^@ (iii) ((2pi)/3)^c

Express sin 67^@+cos 75^@ in terms of trigonometric ratios of angles between 0^@ and 45^@ .

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