Questions Archive - Page 402 of 553

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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

-1

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

1

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

1

deepaksoniGuru

Asked: April 5, 2021In: ICSE

Ques 9(b) In the given figure, PB is a tangent to a circle with centre O at B. AB is a chord of length 24 cm at a distance of 5 cm from the centre. If the length of the tangent is 20 cm, find the length of OP.

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This is circle based question from Chapter name- circles Topic – Angle properties of circles Chapter number- 15 It is given ...Read more

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deepaksoniGuru

Asked: April 5, 2021In: ICSE

Question 9. (a) If a, b, c are the sides of a right triangle where c is the hypotenuse, prove that the radius r of the circle which touches the sides of the triangle is given by r=(a+b-c)/2

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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 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

0

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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