Advertisement Remove all ads

Express Each One of the Following in Terms of Trigonometric Ratios of Angles Lying Between 0° and 45° Cosec 54° + Sin 72° - Mathematics

Express each one of the following in terms of trigonometric ratios of angles lying between 0° and 45°

cosec 54° + sin 72°

Advertisement Remove all ads

Solution

We know `sin(90^@ - theta) = cos theta` and `cosec(90^@ - theta) = sec theta` So

`cosec 54° + sin 72° = cosec(90^@ - 36^@) + sin (90^@ - 18^@)`

`= sec 36^@ + cos 18^@`

hus the desired expression is sec 36^@ + cos 18^@`

  Is there an error in this question or solution?
Advertisement Remove all ads

APPEARS IN

RD Sharma Class 10 Maths
Chapter 10 Trigonometric Ratios
Exercise 10.3 | Q 3.5 | Page 53
Advertisement Remove all ads
Advertisement Remove all ads
Share
Notifications

View all notifications


      Forgot password?
View in app×