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Trigonometrical Equations
easy
સમીકરણ ${\rm{cosec}}\theta + 2 = 0$ નું સમાધાન કરે તેવી $\theta (0 < \theta < {360^o})$ ની કિમતો મેળવો.
A
${210^o},{300^o}$
B
${240^o},{300^o}$
C
${210^o},{240^o}$
D
${210^o},{330^o}$
Solution
(d) ${\rm{cosec }}\theta + 2 = 0$
$ \Rightarrow $ $\sin \theta = – \frac{1}{2}$
$ \Rightarrow $ $\theta = 210^\circ $ or $330^\circ $.
Standard 11
Mathematics