1.

If x = $a sec\alpha cos\beta$ , y = $b sec\alpha sin\beta$, z = $c tan\alpha$, then the value $\frac{x^{2}}{a^{2}}+\frac{y^{2}}{b^{2}}-\frac{z^{2}}{c^{2}}$ is1). 22). 03). 14). -1

Answer» 0 : - is CORRECT HENCE OPTION 3


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