Q29.The value of cos2 17° – sin2 73° is

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Q29.The value of cos2 17° – sin2 73° is

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(a) 0
(b) 1
(c) -1
(d) 3

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Class 10 Maths swatiqna 3 years 2021-12-23T11:42:26+00:00 2021-12-23T11:42:26+00:00 1 Answer 11 views Enlightened 0

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A scale drawing of an object is the same shape at the object but a different size. The scale of a drawing is a comparison of the length used on a drawing to the length it represents. The scale is written as a ratio. The ratio of two corresponding sides in similar figures is called the scale factor Scale factor= length in image / corresponding length in object If one shape can become another using revising, then the shapes are similar. Hence, two shapes are similar when one can become the other after a resize, flip, slide or turn. In the photograph below showing the side view of a train engine. Scale factor is 1:200 This means that a length of 1 cm on the photograph above corresponds to a length of 200cm or 2 m, of the actual engine. The scale can also be written as the ratio of two lengths.The length of AB in the given figure:
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A scale drawing of an object is the same shape at the object but a different size. The scale of a drawing is a comparison What is the actual width of the door if the width of the door in photograph is 0.35cm?of the length used on a drawing to the length it represents. The scale is written as a ratio. The ratio of two corresponding sides in similar figures is called the scale factor Scale factor= length in image / corresponding length in object If one shape can become another using revising, then the shapes are similar. Hence, two shapes are similar when one can become the other after a resize, flip, slide or turn. In the photograph below showing the side view of a train engine. Scale factor is 1:200 This means that a length of 1 cm on the photograph above corresponds to a length of 200cm or 2 m, of the actual engine. The scale can also be written as the ratio of two lengths.
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.A scale drawing of an object is the same shape at the object but a different size. The scale of a drawing is a comparison of the length used on a drawing to the length it represents. The scale is written as a ratio. The ratio of two corresponding sides in similar figures is called the scale factor Scale factor= length in image / corresponding length in object If one shape can become another using revising, then the shapes are similar. Hence, two shapes are similar when one can become the other after a resize, flip, slide or turn. In the photograph below showing the side view of a train engine. Scale factor is 1:200 This means that a length of 1 cm on the photograph above corresponds to a length of 200cm or 2 m, of the actual engine. The scale can also be written as the ratio of two lengths.If the length of the model is 11cm, then the overall length of the engine in the photograph above, including the couplings (mechanism used to connect) is:

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swatiqna Enlightened · Answer 1 · 2021-12-23T11:43:13+00:00

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2021-12-23T11:43:13+00:00 December 23, 2021 at 11:43 am

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Ans: (a) 0
Explanation: To find the value of
cos217-sin273
We know that,
sin(90-x)=cos x
→sin2(90-x)=cos2x
Here,
sin273
=sin2(90-17)
=cos217
Now,
cos217-cos217=0

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Q29.The value of cos2 17° – sin2 73° is

Q29.The value of cos2 17° – sin2 73° is

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