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Rajan@2021Guru

Asked: April 4, 2021In: CBSE

In a ∆ABC, in which ∠C = 90°, ∠ABC = θ°, BC = 21 units, AB = 29 units. Show that (cos^2θ – sin^2 θ) = 41/841.

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This is the basic and conceptual question from trigonometric ratios in which we are to prove that (cos^2θ – sin^2 ...Read more

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Rajan@2021Guru

Asked: April 5, 2021In: CBSE

If A = 60° and B = 30° verify that sin(A+B) = sin A cos B + cos A sin B

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This is the basic and conceptual question from trigonometric ratios in which we have given A = 60° and B ...Read more

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Rajan@2021Guru

Asked: April 8, 2021In: CBSE

Without using trigonometric tables, prove that cos²57° – sin²33° = 0

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This is the basic and conceptual question from trigonometric ratios on complementary angles in which we have to show that ...Read more

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Rajan@2021Guru

Asked: April 8, 2021In: CBSE

Express the following in terms of T-ratios of angles lying between 0° and 45°: sec78° + cosec56°

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This question is from trigonometry topic -trigonometric ratios on complementary angles in which we have to express the following in ...Read more

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Rajan@2021Guru

Asked: April 9, 2021In: CBSE

Prove that: (1+tan²θ)(1+cot²θ) = 1/(sin²θ-sin^4θ)

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This question is from trigonometry topic – trigonometric identities in which we have been asked to prove that (1+tan²θ)(1+cot²θ) = ...Read more

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deepaksoniGuru

Asked: April 15, 2021In: ICSE

Question 19. In the given figure, AD is a diameter of a circle with centre O and AB is tangent at A. C is a point on the circle such that DC produced intersects the tangent of B. If ∠ABC = 50°, find ∠AOC.

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One of the most important and exam oriented question from Chapter name- circles Topic – Angle properties of circles Chapter ...Read more

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Rajan@2021Guru

Asked: April 16, 2021In: CBSE

If x=acos³θ and y=bsin³θ, prove that (x/a)⅔+(y/b)⅔=1

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Sir kindly give me a detailed solution of this question as it is taken from trigonometry, topic – trigonometric identities ...Read more

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In a ∆ABC, in which ∠C = 90°, ∠ABC = θ°, BC = 21 units, AB = 29 units. Show that (cos^2θ – sin^2 θ) = 41/841.

If A = 60° and B = 30° verify that sin(A+B) = sin A cos B + cos A sin B

Without using trigonometric tables, prove that cos²57° – sin²33° = 0

Express the following in terms of T-ratios of angles lying between 0° and 45°: sec78° + cosec56°

Prove that: (1+tan²θ)(1+cot²θ) = 1/(sin²θ-sin^4θ)

Question 19. In the given figure, AD is a diameter of a circle with centre O and AB is tangent at A. C is a point on the circle such that DC produced intersects the tangent of B. If ∠ABC = 50°, find ∠AOC.

If x=acos³θ and y=bsin³θ, prove that (x/a)⅔+(y/b)⅔=1