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 2 years 2021-12-23T11:42:26+00:00 2021-12-23T11:42:26+00:00 1 Answer 10 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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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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