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prove that cos^2 θ (1+ tan2 θ) = 1

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prove that sin^2θ/cosθ+cosθ=secθ

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If tan θ = 1, then find the value of sinθ+ cosθ /secθ+cosecθ

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If 5 sec θ – 12 cosec θ = θ, find the values of sec θ, cos θ and sin θ.

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If cot θ = 40/9, find the values of cosec θ and sin θ

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If tan θ = 3/4, find the values of sec θ and cos θ.

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If sin θ = 7/25, find the values of cos θ and tan θ.

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Trigonometry notes std 10th maharashtra board pdf english medium exercise 6.1

asked Sep 29, 2021 in Trigonometry by Doubtly (98.9k points)

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If the absolute refractive indices of glass and water are 3/2 and 4/3 respectively, what is the refractive index of glass with respect to water?

asked Sep 27, 2021 in Chapter 6: Refraction of light by Doubtly (98.9k points)

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(i). If the speed of light in a medium is 1.5 × 108 m/s, what is the absolute refractive index of the medium?

asked Sep 27, 2021 in Chapter 6: Refraction of light by Doubtly (98.9k points)

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C. If the refractive index of glass with respect to air is 3/2, what is the refractive index of air with respect to glass? (i). 1/2 (ii). 3 (iii). 1/3 (iv). 2/3

asked Sep 27, 2021 in Chapter 6: Refraction of light by Doubtly (98.9k points)

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B. We can see the Sun even when it is little below the horizon because of i. Reflection of light ii. Refraction of light

asked Sep 27, 2021 in Chapter 6: Refraction of light by Doubtly (98.9k points)

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A. What is the reason for the twinkling of stars? i . Explosions occurring in stars from time to time ii. Absorption of light in the earth’s atmosphere

asked Sep 27, 2021 in Chapter 6: Refraction of light by Doubtly (98.9k points)

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(ii) A rainbow is the combined effect of the refraction, dispersion, and total internal reflection of light.

asked Sep 27, 2021 in Chapter 6: Refraction of light by Doubtly (98.9k points)

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(i) If the angle of incidence and angle of emergence of a light ray falling on a glass slab are i and e respectively, prove that, i = e.

asked Sep 27, 2021 in Chapter 6: Refraction of light by Doubtly (98.9k points)

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Fill in the blanks and Explain the completed sentences. (i) . Refractive index depends on the ............. of light.

asked Sep 27, 2021 in Chapter 6: Refraction of light by Doubtly (98.9k points)

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4.A calorimeter has mass 100 g and specific heat 0.1 kcal/ kg °C. It contains 250 gm of liquid at 30°C having specific heat of 0.4 kcal/kg °C.

asked Sep 27, 2021 in Chapter 5: Heat by Doubtly (98.9k points)

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A thermally insulated pot has 150 g ice at temperature 0°C. How much steam of 100°C has to be mixed to it, so that water of temperature 50°C will be obtained?

asked Sep 27, 2021 in Chapter 5: Heat by Doubtly (98.9k points)

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Liquid ammonia is used in ice factory for making ice from water. If water at 20°C is to be converted into 2 kg ice at 0°C,

asked Sep 27, 2021 in Chapter 5: Heat by Doubtly (98.9k points)

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Equal heat is given to two objects A and B of mass 1 g. Temperature of A increases by 3°C and B by 5°C. Which object has more specific heat? And by what factor?

asked Sep 27, 2021 in Chapter 5: Heat by Doubtly (98.9k points)

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