trigonometric ratios Archives - Page 7 of 13

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Rajan@2021Guru

Asked: April 5, 2021In: CBSE

In the adjoining figure, ∆ ABC is a right-angled at B and ∠A = 30°. If BC = 6 cm, Find (i) AB, (ii) AC.

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This is the basic and exam oriented question from trigonometric ratios in which we have given a figure of right ...Read more

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Rajan@2021Guru

Asked: April 5, 2021In: CBSE

In the adjoining figure, ∆ABC is a right-angled triangle in which ∠B = 90° , ∠A =30° and AC = 20cm. Find (i) BC, (ii) AB.

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This is the basic and conceptual question from trigonometric ratios in which we have given a figure of ∆ABC in ...Read more

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Rajan@2021Guru

Asked: April 5, 2021In: CBSE

Using the formula, sin A = √(1−cos 2A)/ 2 , find the value of sin 30°, it being given that cos 60° = 1/2 .

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This is the basic and exam oriented question from trigonometric ratios in which we have given sin A = √(1−cos ...Read more

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Rajan@2021Guru

Asked: April 5, 2021In: CBSE

Using the formula, cos A = √(1+cos 2A)/ 2 , find the value of cos 30° , it being given that cos 60° = 1/2 .

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This is the basic and conceptual question from trigonometric ratios in which we have cos A = √(1+cos 2A)/ 2, ...Read more

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Rajan@2021Guru

Asked: April 5, 2021In: CBSE

Using the formula, tan 2A = (2tanA) / (1-tan 2A), find the value of tan 60°; given that tan30° = 1/√3…

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This is the basic and conceptual question from trigonometric ratios in which we have given tan2A = (2tanA) / (1-tan 2 ...Read more

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Rajan@2021Guru

Asked: April 5, 2021In: CBSE

if A and B are acute angles such that tan A= 1/3 , tan B = 1/2 and tan( A +B) = (tan A+ tanB) /(1- tanA tanB), show that A+ B = 45°.

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

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Rajan@2021Guru

Asked: April 5, 2021In: CBSE

If A = 60° and B = 30° verify that tan(A-B) = (tanA – tanB)/(1 + tanA tanB)

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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 5, 2021In: CBSE

If A = 60° and B = 30° verify that cos(A-B) = cosA cosB – sinA sinB

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

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Rajan@2021Guru

Asked: April 5, 2021In: CBSE

If A = 60° and B = 30° verify that sin(A-B) = sinA cosB – cosA sinB

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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 5, 2021In: CBSE

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