Class 11MathematicsTrigonometrical Ratios, Functions and IdentitiesMix Examples-Trigonometrical Ratios, Functions and Identities
Easy$0 < \theta < \frac{\pi}{2}$ માટે નીચેનામાંથી કયું/કયા વિધાન સાચું/સાચા છે?
- A$(\cos \theta)^{1/2} \leq \cos \frac{\theta}{2}$
- B$(\cos \theta)^{3/4} \geq \cos \frac{3\theta}{4}$
- C$\cos \frac{5\theta}{6} \geq (\cos \theta)^{5/6}$
- D$\cos \frac{7\theta}{8} \leq (\cos \theta)^{7/8}$
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DifficultAP EAMCET 2011
View Solutionગુણાકારની કિંમત શોધો: $\left(1+\cos \frac{\pi}{8}\right)\left(1+\cos \frac{2 \pi}{8}\right)\left(1+\cos \frac{3 \pi}{8}\right)\left(1+\cos \frac{4 \pi}{8}\right)\left(1+\cos \frac{5 \pi}{8}\right)\left(1+\cos \frac{6 \pi}{8}\right)\left(1+\cos \frac{7 \pi}{8}\right)$
DifficultAP EAMCET 2023
View Solutionજો $\alpha = 22^\circ 30'$ હોય,તો $(1 + \cos \alpha )(1 + \cos 3\alpha )(1 + \cos 5\alpha )(1 + \cos 7\alpha )$ ની કિંમત શોધો.
Medium
View Solutionજો $f(\theta) = \cos^3 \theta + \cos^3 \left(\frac{2\pi}{3} + \theta\right) + \cos^3 \left(\theta - \frac{2\pi}{3}\right)$ હોય,તો $f\left(\frac{\pi}{5}\right) = $
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