Question

The value of the expression cosec ( 75° + θ) – sec ( 15° – θ) – tan(55° + θ) + cot (35° – θ) is
OPTION A: - 1
OPTION B: 0
OPTION C: 1
OPTION D: 3/2

QUESTION : 2 Value of sec²26° – cot ² 64° is equal to
OPTION A: 0
OPTION B: 1
OPTION C: - 1
OPTION D: none of these

QUESTION : 3 If cos (9α) = sin α and 0° < 9 α < 90°, then tan (5α) is
OPTION A: 1/√3
OPTION B: √3
OPTION C: 1
OPTION D: 0

QUESTION : 4 If [cos²20°+cos²70°]/[2(sin²59°+sin²31°)] =2/k , then k =
OPTION A: 1
OPTION B: 2
OPTION C: 4
OPTION D: 3

QUESTION : 5 √(1+tan² θ) is equal to (0° < θ < 90°)
OPTION A: Cot θ
OPTION B: cos θ
OPTION C: cosec θ
OPTION D: sec θ

QUESTION : 6 If a vertical pole 6 m high, casts a shadow 2 √3 m long on the level ground, then the Sun’s elevation is
OPTION A: 90°
OPTION B: 45°
OPTION C: 30°
OPTION D: 60°

QUESTION : 7 The ratio of length of a pole and its shadow is √3 : 1. The angle of elevation of the sun is
OPTION A: 60°
OPTION B: 30°
OPTION C: 45°
OPTION D: 90°

QUESTION : 8 From the top of a cliff 50 m high, the angle of elevation of the top of a tower is found to be equal to angle of depression of the foot of the tower. The height of the tower is
OPTION A: 25 m
OPTION B: 50 m
OPTION C: 100 m
OPTION D: 75 m

QUESTION : 9 What is the angle of elevation of the sun when the length of the shadow of a vertical pole is equal to its height?
OPTION A: 45°
OPTION B: 30°
OPTION C: 60°
OPTION D: none of these


QUESTION : 10 If a girl of height 2 m stands at a distance of 4 m from a lamp post and cast a shadow of length 2 m on the ground, then the height of the lamp post is
OPTION A: 4 m
OPTION B: 6 m
OPTION C: 12 m
OPTION D: none of these

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Answer 1

answer:Mai to 8 mai hi mujhe Nahi pata sorry