Chapter 8 – Introduction to Trigonometry
Write ‘True’ or ‘False’ and justify your answer in each of the following: The value of 2sinθ can be a + 1/a , where a is a positive number, and a≠ 1.
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Nov
Write ‘True’ or ‘False’ and justify your answer in each of the following: The value of 2sinθ can be a + 1/a , where a is a positive number, and a≠ 1. and a≠ 1. where a is a positive number Write ‘True’ or ‘False’ and justify your answer in each of the following: The [...]
Write ‘True’ or ‘False’ and justify your answer in each of the following: If a man standing on a platform 3 metres above the surface of a lake observes a cloud and its reflection in the lake, then the angle of elevation of the cloud is equal to the angle of depression of its reflection.
25
Nov
Write ‘True’ or ‘False’ and justify your answer in each of the following: If a man standing on a platform 3 metres above the surface of a lake observes a cloud and its reflection in the lake, then the angle of elevation of the cloud is equal to the angle of depression of its reflection. [...]
Write ‘True’ or ‘False’ and justify your answer in each of the following: If the length of the shadow of a tower is increasing, then the angle of elevation of the sun is also increasing.
25
Nov
Write ‘True’ or ‘False’ and justify your answer in each of the following: If the length of the shadow of a tower is increasing, then the angle of elevation of the sun is also increasing. then the angle of elevation of the sun is also increasing. Write ‘True’ or ‘False’ and justify your answer in [...]
Write ‘True’ or ‘False’ and justify your answer in each of the following: (tan θ + 2) (2 tan θ + 1) = 5 tan θ + sec^2θ .
25
Nov
Write ‘True’ or ‘False’ and justify your answer in each of the following: (tan θ + 2) (2 tan θ + 1) = 5 tan θ + sec^2θ . Write ‘True’ or ‘False’ and justify your answer in each of the following: (tan θ + 2) (2 tan θ + 1) = 5 tan θ [...]
Write ‘True’ or ‘False’ and justify your answer in each of the following: If cosA + cos^2A = 1, then sin^2A + sin^4A= 1.
25
Nov
Write ‘True’ or ‘False’ and justify your answer in each of the following: If cosA + cos^2A = 1, then sin^2A + sin^4A= 1. then sin^2A + sin^4A= 1. Write ‘True’ or ‘False’ and justify your answer in each of the following: If cosA + cos^2A = 1 November 25, 2020 Category: Chapter 8 - [...]
Write ‘True’ or ‘False’ and justify your answer in each of the following: root(1-cos^2 theta) sec^2 theta = tan theta
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Nov
Write ‘True’ or ‘False’ and justify your answer in each of the following: root(1-cos^2 theta) sec^2 theta = tan theta Write ‘True’ or ‘False’ and justify your answer in each of the following: root(1-cos^2 theta) sec^2 theta = tan theta November 25, 2020 Category: Chapter 8 - Introduction to Trigonometry , Maths , NCERT Class [...]
Write ‘True’ or ‘False’ and justify your answer in each of the following: The value of the expression (sin 80°- cos 80°) is negative.
25
Nov
Write ‘True’ or ‘False’ and justify your answer in each of the following: The value of the expression (sin 80°- cos 80°) is negative. Write ‘True’ or ‘False’ and justify your answer in each of the following: The value of the expression (sin 80°- cos 80°) is negative. November 25, 2020 Category: Chapter 8 - [...]
Write ‘True’ or ‘False’ and justify your answer in each of the following: The value of the expression (cos^2 23° – sin^2 67°) is positive.
25
Nov
Write ‘True’ or ‘False’ and justify your answer in each of the following: The value of the expression (cos^2 23° – sin^2 67°) is positive. Write ‘True’ or ‘False’ and justify your answer in each of the following: The value of the expression (cos^2 23° – sin^2 67°) is positive. November 25, 2020 Category: Chapter [...]
Write ‘True’ or ‘False’ and justify your answer in each of the following: tan 47 degree/ cot 43 degree = 1
25
Nov
Write ‘True’ or ‘False’ and justify your answer in each of the following: tan 47 degree/ cot 43 degree = 1 Write ‘True’ or ‘False’ and justify your answer in each of the following: tan 47 degree/ cot 43 degree = 1 November 25, 2020 Category: Chapter 8 - Introduction to Trigonometry , Maths , [...]
A pole 6 m high casts a shadow 2√3 m long on the ground, then the Sun’s elevation is
25
Nov
A pole 6 m high casts a shadow 2√3 m long on the ground, then the Sun’s elevation is A pole 6 m high casts a shadow 2√3 m long on the ground then the Sun’s elevation is November 25, 2020 Category: Chapter 8 - Introduction to Trigonometry , Maths , NCERT Class 10 ,