Question

Please answer 2nd and 7th with explanation .. Don't give only options...​

Answer 1

Answer:

your answers

2. A

7 . A

Step-by-step explanation:

GIVEN IN PHOTO

thank the answer

Don't forget to mark me as BRAINLIST

follow me

Answer 2

2.QUESTION

Answer:

c=b^2/4a. (OPTION 'A')

Step-by-step explanation:

In the question it is given that the roots are equal therefore the discriminant is equal to 0

discriminant is b^2-4ac

b^2-4ac=0

b^2=4ac

c=b^2/4a

7.QUESTION

Answer:

1 (OPTION 'A')

Step by step explanation:

Given: sinA+sin^2A=1

sinA+1-cos^sA=1. (sin^2A+cos^2A=1)

cos^2A=sinA. -----------1

cos^4A=sin^2A. --------2

To find: cos^2A+cos^4A. ------3

sinA+sin^2A. (sub 1&2 in 3)

sinA+sin^2A=1. (given)

HOPE IT HELPS

PLS MARK AS BRAINLIEST