CBSE Class 10CBSE
Share
Notifications

View all notifications
Books Shortlist
Your shortlist is empty

Solution for Evaluate the Following Cos 60° Cos 45° - Sin 60° ∙ Sin 45° - CBSE Class 10 - Mathematics

Login
Create free account


      Forgot password?

Question

Evaluate the following

cos 60° cos 45° - sin 60° ∙ sin 45°

Solution

cos 60° cos 45° - sin 60° ∙ sin 45° …(i)

By trigonometric ratios we know that,

`cos 60^@ = 1/2 cos 45^@ = 1/sqrt2`

`sin 60^@ = sqrt3/2    sin 45^@ = 1/sqrt2`

By substituting above value in (i), we get

`1/2. 1/sqrt2 - sqrt3/2. 1/sqrt2 => (1 - sqrt3)/(2sqrt2)`

  Is there an error in this question or solution?

APPEARS IN

Solution Evaluate the Following Cos 60° Cos 45° - Sin 60° ∙ Sin 45° Concept: Trigonometric Ratios.
S
View in app×