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8. Introduction to Trigonometry and Its Applications
Home · Class 10 · Maths · NCERT - Exemplar Mathematics · 8. Introduction to Trigonometry and Its Applications
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Q5 of 120 Page 99

If sin θ +2cos θ =1, then prove that 2 sin θ -cos θ =2.

Given: sin θ +2 cos θ = 1

Squaring on both sides,












Hence proved.


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4

If 1+sin2θ =3sinθ cos θ, then prove that tanθ =1 or .

5

If sin θ +2cos θ =1, then prove that 2 sin θ -cos θ =2.

6

The angle of elevation of the top of a tower from two points distant s and t from its foot are complementary. Prove that the height of the tower is .

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The angle of elevation of the top of a tower from two points distant s and t from its foot are complementary. Prove that the height of the tower is .

Questions · 120
8. Introduction to Trigonometry and Its Applications
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