Question 11 MarkIf $\tan \alpha=\frac{x}{x+1}$ and $\tan \beta=\frac{1}{2 x+1}$, then the value of $\alpha+\beta$ is $\frac{\pi}{6}$.AnswerFalseView full question & answer→
Question 21 MarkThe value of $\cos 1^{\circ} \cos 2^{\circ} \cos 3^{\circ}$ ________ $\cos 179^{\circ}$ is $1.$AnswerFalseView full question & answer→
Question 31 MarkThe value of $\tan 1^{\circ} \tan 2^{\circ} \tan 3^{\circ} $ ____________ $\tan 89^{\circ}$ is 1.AnswerTrueView full question & answer→
Question 61 MarkThe maximum value of $\cos (\cos x)$ is 1 and the minimum value is $\cos 1$.AnswerTrueView full question & answer→
Question 71 MarkThe value of $\sin \left(\frac{151 \pi}{6}\right)$ is $-\frac{1}{2}$.AnswerTrueView full question & answer→
Question 81 MarkThe value of $\sin \left(\frac{31 \pi}{3}\right)$ is $-\frac{\sqrt{3}}{2}$.AnswerFalseView full question & answer→
Question 91 MarkThe radian measure of $40^{\circ} 20^{\prime}$ is $\frac{121}{540}$ radian.AnswerFalseView full question & answer→
Question 101 MarkThe circumference of a circle with unit radius is $2 \pi$.AnswerTrueView full question & answer→