TS Polycet (Polytechnic) 2019 Previous Question Paper with Answers And Model Papers With Complete Analysis

41)Total surface area of a hemisphere is

42)If the radius of base of a cylinder is doubled and the height remains unchanged, then its curved surface area is

43)If a right-angled triangle is revolved about its hypotenuse, then it will form a

44)tan 85° tan 65° tan 45° tan 25° tan 5° =

45)If sin 18° = cos x, then x =?

46) =

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B) tan θ
Explanation:= tanθ

47)If ∠A = 60°, then 3sin³A – 4sinA =

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A)
Explanation:3(sin 60°)³ – 4sin 60° =
=
=

48)If a cos θ + b sin θ = p; a sin θ- b cos θ = q, then which of the following conditions is true?

49)If tan α = 1/2., tan β = 1/3, then (α+β)=

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C) 45°
Explanation:tanα = 1/2., tan β = 1/3,
Tan (α+β) =
= = 1
∴ (α+β) = 45°

50)If the angle of elevation of the sun is 60°, then the ratio of the height of a tree with its shadow is

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C) √3 : 1
Explanation:tan 60°= h/x
⇒ √3/1 = h/x ⇒ h : x = √3 : 1