Class 11MathematicsTrigonometrical Ratios, Functions and IdentitiesMaximum and minimum values of trigonometrical functions, Conditional trigonometrical identities
Easyयदि $A + B + C = 270^o$ है,तो $\cos 2A + \cos 2B + \cos 2C + 4\sin A \sin B \sin C = $
- A$0$
- B$1$
- C$2$
- D$3$
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Similar Questions
$5 \sin^2 \theta + 4 \cos^2 \theta$ का न्यूनतम मान क्या है?
Easy
View Solution$(\cos^{2}\theta - 6\sin\theta \cos\theta + 3\sin^{2}\theta + 2)$ का न्यूनतम मान क्या है:
यदि $A = \sin^2 \theta + \cos^4 \theta$ है,तो $\theta$ के सभी वास्तविक मानों के लिए:
MediumIIT 1980
View Solutionयदि $a^{2} > b^{2}$ है,तो $f(x) = a^{2} \cos^{2} x + b^{2} \sin^{2} x$ का न्यूनतम मान ज्ञात कीजिए।
यदि $A = \sin^2 x + \cos^4 x$ है,तो सभी वास्तविक $x$ के लिए :
DifficultIIT 1980
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