Advertisement Remove all ads

If sin x = cos y, then x + y = 45° ; write true of false - Mathematics

Advertisement Remove all ads
Advertisement Remove all ads
MCQ
Sum
True or False

If sin x = cos y, then x + y = 45° ; write true of false

Options

  • True

  • False

Advertisement Remove all ads

Solution

sin x = cosy = sin`(x/2 – y )`

if x and y are acute angles,

x = `(x)/(2) – y`

x + y = `(x)/(2)`

∴ x + y = 45° is false.

Concept: Trigonometric Ratios of Some Special Angles
  Is there an error in this question or solution?
Advertisement Remove all ads

APPEARS IN

Selina Concise Mathematics Class 9 ICSE
Chapter 23 Trigonometrical Ratios of Standard Angles [Including Evaluation of an Expression Involving Trigonometric Ratios]
Exercise 23 (A) | Q 8.1 | Page 291
Advertisement Remove all ads
Share
Notifications

View all notifications


      Forgot password?
View in app×