- A
- B
- C1 - cos A
- D
Step-by-Step Solution
= cos + cos A. Now cos A. Both equal 1 + cos A, so they match.
Answer: A)
Vivek simplifies using sin and cos.
Which is the correct simplified form?
Class 10Trigonometric IdentitiesTrigonometry
Master this chapter in 30 minutes a day.
Don't just memorise the answer — build a daily practice habit.
Practice 5 Similar Questions Free →All Trigonometric Identities practice questions
More Class 10 Trigonometric Identities practice
A textbook problem states: prove A - 2 ^3 A/2 ^3 A - A = tan A. For A = 45°, what…If tan A = 1√3, find the value of 1 - ^2 A/1 + ^2 A. A is acute.A class is asked: if sin A - cos A = 0 for an acute angle A, what is the value of sin^4…Prove sin^4 A - cos^4 A = sin^2 A - cos^2 A. Which identity makes this work?Simplify the expression cos^2 A * cosec A - cosec A. Which is the correct simplified form?