Some Applications of Trigonometry
The angle of elevation of a tower CD at a place A due south of it is 60o and at a place B due west of A, the elevation is 30o. If AB=3KM, height of the tower is
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In a right angled △ ABC. m∠ABC=90o, m∠=30o. If BC=9 cm then AC?
A person standing on the bank of a river observes that the angle of elevation of the top of a tree standing on the opposite bank is 60∘. when he moves 40m away from the bank, he finds the angle of elevation to be 30∘. Find the width of the river. (3 = 1.73)
If a vertical stick 12 m long casts a shadow 8 m long on the ground and at the same time a tower casts a shadow 40 m long on the ground, then the height of the tower is
Find the angular elevation (angle of elevation from the ground level) of the Sun when the length of the shadow of a 30m long pole is 103m.
A tower HP standing vertically at the orthocentre H of a triangle ABC subtends an angle A at the vertex A of the triangle. The height of the tower is....
"If the angle of elevation of Sun increases from 0o to 90o, then the length of shadow of a tower decreases." Is this statement true? Justify your answer.
A man of height 1.5 meter is moving away from lamppost of two rate 1.2 meter per sec. If two height of two lamppost is 4.5 meter. Find two rate which i) his shadow is lengthening ii) two tip of his shadow is moving
A kite is flying at an inclination of 60o with the horizontal. If the length of the thread is 120m, then the height of the kite is: