trigonometric identities Archives - Page 14 of 15

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deepaksoniGuru

Asked: March 15, 2021In: ICSE

(i) (sec A – 1)/(sec A + 1) = (1 – cos A)/(1 + cos A) (ii) tan2 θ/ (sec θ – 1)2 = (1 + cos θ)/ (1 – cos θ) (iii) (1 + tan A)2 + (1 – tan A)2 = 2 sec2 A (iv) sec2 A + cosec2 A = sec2 A. cosec2 A

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This question has been taken from the Book- ML Aggarwal Board- ICSE Publication- Avichal Chapter- Trigonometric Identities Chapter number-18 We ...Read more

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deepaksoniGuru

Asked: March 15, 2021In: ICSE

(i) sin A/ (1 + cos A) = (1 – cos A)/ sin A (ii) (1 – tan2 A)/ (cot2 A – 1) = tan2 A (iii) sin A/ (1 + cos A) = cosec A – cot A

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This is an important question taken from the Book ML Aggarwal, Avichal publication, class 10th and, chapter 18 We have to ...Read more

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deepaksoniGuru

Asked: March 15, 2021In: ICSE

(i) 1/ (1 + cos A) + 1/ (1 – cos A) = 2 cosec2 A (ii) 1/(sec A + tan A) + 1/(sec A – tan A) = 2 sec A

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This question has been taken form the Book- ML Aggarwal Board- ICSE Publication- Avichal Chapter- Trigonometric Identities Chapter number-18 We have to ...Read more

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deepaksoniGuru

Asked: March 15, 2021In: ICSE

1). 2(sec2 35°- cot 2 55°) – cos 28° cosec 62°/tan 18° tan36° tan 30° tan 54° tan 72°. (ii)[cosec2 (90°- theta) – tan2 theta] / 2 (cos2 48° + cos2 42°) – 2tan2 30° sec2 52° sin2 38°/cosec2 70°- tan2 20°

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This ques is from the Book- ML Aggarwal Board- ICSE Publication- Avichal Chapter- Trigonometric Identities Chapter number-18 1). 2(sec2 35°- ...Read more

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deepaksoniGuru

Asked: March 15, 2021In: ICSE

(i) (tan 25o/ cosec 65o)2 + (cot 25o/ sec 65o)2 + 2 tan 18o tan 45o tan 75o (ii) (cos2 25o + cos2 65o) + cosec θ sec (90o – θ) – cot θ tan (90o – θ)

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This is an important question taken from the Book- ML Aggarwal Board- ICSE Publication- Avichal Chapter- Trigonometric Identities Chapter number-18 (i) ...Read more

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deepaksoniGuru

Asked: March 15, 2021In: ICSE

Without using trigonometric tables, evaluate the following (i) (sin 35o cos 55o + cos 35o sin 55 o)/ (cosec2 10o – tan2 80 o) (ii) sin2 34o + sin2 56o + 2 tan18o tan 72o – cot2 30o

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This ques has been asked in 2010. So it is very important ques. This ques has been taken from the Book ...Read more

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deepaksoniGuru

Asked: March 15, 2021In: ICSE

Without using trigonometric tables, evaluate the following (6 to 10): 6. (i) cos2 26o + cos 64o sin 26o + (tan 36o/ cot 54o) (ii) (sec 17o/ cosec 73o) + (tan 68o/ cot 22o) + cos2 44o + cos2 46o

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This question is from the Book- ML Aggarwal Board- ICSE Publication- Avichal Chapter- Trigonometric Identities Chapter number-18 This ques has ...Read more

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deepaksoniGuru

Asked: March 15, 2021In: ICSE

If 12 cosec θ = 13, find the value of (2 sin θ – 3 cos θ)/ (4 sin θ – 9 cos θ)

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This ques has been taken from the Book- ML Aggarwal Board- ICSE Publication- Avichal Chapter 18th Chapter- Trigonometric Identities This has been ...Read more

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deepaksoniGuru

Asked: March 15, 2021In: ICSE

If tan A = 1/√3, find all other trigonometric ratios of angle A.

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This is an important question from Book- ML Aggarwal Board- ICSE Publication- Avichal Chapter- Trigonometric Identities This question has been asked in ...Read more

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deepaksoniGuru

Asked: March 15, 2021In: ICSE

Express the ratios cos A, tan A and sec A in terms of sin A.

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This ques is from ML Aggarwal book, Avichal publication, class 10th. Chapter 18, trigonometric identities Express the ratios cos A, tan A ...Read more

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