Trigonometric Ratios of 45 degree

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Trigonometric ratios for 45^(@)

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Express "cosec"48^(@)+tan88^(@) in terms of trigonometric ratios of angle between 0^(@)and45^(@) .

Express cot85^(@)+cos75^(@) in terms of trigonometric ratios of angles between 0^(o) and 45^(@)

Express sin67^(@)+cos75^(@) in terms of trigonometric ratios of angles between 0^(@) and 45^(@)

Trigonometric ratios of 0^(@) and 90^(@)