maths-trigonometry A + B = 90

A + B = 90

solve ?

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• 0
• -1
• 8

solve ?

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• 4
• -1
• 8

solve ?

• 7/3
• 4
• 7
• 7/2

solve ?

Find : Tan7.Tan11. Tan23. Tan30 Tan45. Tan67. Tan79. Tan89 = ?

• 1/√3
• √3
• 2√3
• 2

Find : Cos1.Cos2.Cos3.—————-Cos179 = ?

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• -1
• 1
• 2

Find : Cos(90-θ) = Sin(3θ-50) Find θ = ?

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• 20
• 45
• 30

Find : Cos²29° + cos²61° ?

• √3/2
• 2
• 1
• 0

यदि \(7\sin^2\theta + 4\cos^2\theta = 5\) और \(\theta\) पहले चतुर्थांश में स्थित है, तो \(\dfrac{\sqrt{3}\sec\theta \cdot \tan\theta}{\sqrt{2}\cot\theta – \sqrt{3}\cos\theta}\) का मान क्या है?

• \(2(1+\sqrt{2})\)
• \(3\sqrt{2}\)
• \(2(\sqrt{2}-1)\)
• \(4\sqrt{2}\)

यदि \(\dfrac{\sin^2\theta}{\cos^2\theta – 3\cos\theta + 2} = 1\), \(\theta\) चतुर्थांश में है, तो \(\dfrac{\tan^2\dfrac{\theta}{2} + \sin^2\dfrac{\theta}{2}}{\tan\theta + \sin\theta}\) का मान है?

• \(\dfrac{2\sqrt{3}}{27}\)
• \(\dfrac{5\sqrt{3}}{27}\)
• \(\dfrac{2\sqrt{3}}{9}\)
• \(\dfrac{7\sqrt{3}}{54}\)