Gagan Bansal

Kashvi Rao

Asked: October 30, 2020In: Class 10

If sec 4A = cosec (A – 20°), where 4A is an acute angle, find the value of A.

NCERT Solutions for Class 10 Maths Chapter 8 Important NCERT Questions Introduction Trigonometry NCERT Books for Session 2022-2023 CBSE Board and UP Board Others state Board EXERCISE 8.3 Page No:189 Questions No:5

Kashvi Rao

Asked: October 30, 2020In: Class 10

If A, B and C are interior angles of a triangle ABC, then show that Sin(B+C/2) = cos A/2.

NCERT Solutions for Class 10 Maths Chapter 8 Important NCERT Questions Introduction Trigonometry NCERT Books for Session 2022-2023 CBSE Board and UP Board Others state Board EXERCISE 8.3 Page No:190 Questions No:6

Kashvi Rao

Asked: October 30, 2020In: Class 10

Express sin 67° + cos 75° in terms of trigonometric ratios of angles between 0° and 45°.

NCERT Solutions for Class 10 Maths Chapter 8 Important NCERT Questions Introduction Trigonometry NCERT Books for Session 2022-2023 CBSE Board and UP Board Others state Board EXERCISE 8.3 Page No:190 Questions No:7

Gagan Bansal

If sec 4A = cosec (A – 20°), where 4A is an acute angle, find the value of A.

If A, B and C are interior angles of a triangle ABC, then show that Sin(B+C/2) = cos A/2.

Express sin 67° + cos 75° in terms of trigonometric ratios of angles between 0° and 45°.

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