Trigonometric Identities (Text)

Quadrant   Sign of ratios Remember I All are +ve   ( 90 –  θ,   360 +  θ ) All II Sin  and cosec  are +ve, Other ratios are –ve   ( 90 +  θ,   180 –  θ ) Silver   III tan θ and  cot θ  are +ve, Other ratios are –ve ( 180 + …

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