Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • NCERT
  • If sin A = 3/4, calculate cos A and tan A.

3.     If \sin A=\frac{3}{4}, calculate \cos A and \tan A.

Answers (1)

best_answer

Suppose \DeltaABC is a right-angled triangle in which \angle B = 90^0 and we have \sin A=\frac{3}{4},
So, 

Let the length of AB be 4 unit and the length of BC = 3 unit
So, by using Pythagoras theorem,
AB = \sqrt{16-9} = \sqrt{7} units
Therefore, 
\cos A = \frac{AB}{AC} = \frac{\sqrt{7}}{4}  and \tan A = \frac{BC}{AB} = \frac{3}{\sqrt{7}}

Posted by

manish

View full answer

Similar Questions

Trending Articles/News

anam-khan

Board Exam Date 2025 Live: Bihar Class 10, 12 model papers out, time table soon; updates on CBSE, UP

Latest Question