Class 11MathematicsTrigonometrical Ratios, Functions and IdentitiesTrigonometrical ratios of sum and difference of two and three angles
Easy$\sin 15^{\circ}$ નું મૂલ્ય શોધો.
- A$\frac{\sqrt{3} - 1}{2\sqrt{2}}$
- B$\frac{\sqrt{3} + 1}{2\sqrt{2}}$
- C$\frac{\sqrt{6} - \sqrt{2}}{4}$
- D$\frac{\sqrt{6} + \sqrt{2}}{4}$
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Similar Questions
જો $\tan 80^{\circ} = \alpha$ અને $\tan 47^{\circ} = \beta$ હોય,તો $\tan 37^{\circ}$ ની કિંમત કેટલી થાય?
જો $\sin \theta = \frac{-12}{13}$,$\cos \phi = \frac{-4}{5}$ અને $\theta, \phi$ ત્રીજા ચરણમાં હોય,તો $\tan(\theta - \phi) =$
$\tan 70^{\circ} - \tan 20^{\circ} = a \cdot \tan 50^{\circ}$ માં $a$ ની કિંમત શોધો.
જો બે ખૂણાઓ $\alpha, \beta$ એવા હોય કે $0 < \alpha, \beta < \frac{\pi}{4}$,$\sqrt{1+\cos 2 \alpha}=\frac{3}{\sqrt{5}}$ અને $\frac{\sqrt{1-\cos 2 \beta}}{\sqrt{1+\cos 2 \beta}}=\frac{1}{7}$,તો $(2 \alpha+\beta)=$
$\cos^2 48^{\circ} - \sin^2 12^{\circ}$ ની કિંમત શોધો,જો $\sin 18^{\circ} = \frac{\sqrt{5}-1}{4}$ હોય.
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