Trignometry

Quantitative Aptitude (CCS)

Title

45:30

Video Progress

8 of 24 completed

Notes Progress

5 of 15 completed

MCQs Progress

38 of 100 completed

Subjective Progress

8 of 20 completed

Continue to Next Topic

Indian Economy - Understanding the basics of Indian economic system

Next Topic

Download Solution PDF

Find the value of 16 /√3 (Cos50°Cos10°Cos110°Cos60°).

-1

-2

Explanation:

We have cos x cos (60 – x ) cos (60 + x )
= cos x (cos x cos 60 + Sin x Sin 60°) (cos x cos 60° – Sin x Sin 60°)
= cos x (cos²x cos²60° – Sin²x Sin²60°)

Thus,
cos x ° cos (60 – x )° cos (60 + x ) = 1/4cos (3 x )

By: Amit Kumar

Profile ResourcesReport error

Trial Period Ended