Thank you for registering.

One of our academic counsellors will contact you within 1 working day.

Please check your email for login details.
MY CART (5)

Use Coupon: CART20 and get 20% off on all online Study Material

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: Rs.

There are no items in this cart.
Continue Shopping

if secA-tanA=a then sinA= options 1-a 2 /1+a 2 1+a 2 /1-a 2 2a/1-a 2 2a/1+a 2 1+a 2 /1-a 2

if secA-tanA=a then sinA=
options
  1. 1-a2/1+a2
  2. 1+a2/1-a2
  3. 2a/1-a2
  4. 2a/1+a2
  5. 1+a2/1-a2

Grade:12th Pass

1 Answers

Arun
25763 Points
4 years ago
we know that sec^2 A - tan^2 A =1 and it is given that 
sec A -tan A =a

dividing equation 1 with 2, we get 

sec A + tan A = 1/a
also sec A - tan A = a
 adding and subtracting these equations, we get 

sec A = (a + 1/a )/2 
& tan A = (1/a -a)/2 

thus, sin A = (sin A/ cos A) / (1/cos A) = tan A / sec A =( 1-a^2) / (1+ a^2)

Think You Can Provide A Better Answer ?

Provide a better Answer & Earn Cool Goodies See our forum point policy

ASK QUESTION

Get your questions answered by the expert for free