Question 2 Find the values of other five trigonometric functions if sin x = 3/5, x lies in second quadrant.
Class X1 - Maths -Trigonometric Functions Page 63
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Sinx = 3/5 , where x lies in 2nd quadrant .
In 2nd quadrant :- sinx, cosecx are positive . all rest are negative .
Sinx = 3/5 = P/h
b = √(h² - P²) = √(5² - 3²) = ±4
Cosx = -4/5
secx = 1/cosx = -5/4
Tanx = P/b = -3/4
Cotx = 1/tanx = -4/3
Cosecx = 1/sinx = 5/3
In 2nd quadrant :- sinx, cosecx are positive . all rest are negative .
Sinx = 3/5 = P/h
b = √(h² - P²) = √(5² - 3²) = ±4
Cosx = -4/5
secx = 1/cosx = -5/4
Tanx = P/b = -3/4
Cotx = 1/tanx = -4/3
Cosecx = 1/sinx = 5/3
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