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| 1. |
If cos x=_3/5,x liesin the third quadrant find other value of trigonometry |
| Answer» {tex}\\begin{array}{l}\\cos x=\\frac35\\\\\\sin x=\\sqrt{1-\\frac9{25}}=\\sqrt{\\frac{16}9}=\\pm\\frac45\\\\\\end{array}{/tex}In 3rd quadrantsin is -ve so sinx = -4/5tan is -ve so tanx= -(4/5)/3/5= -4/3other ratios can be calculated | |