Question

53
(A)
10
10
23
7
(C)
(D)
10
10
-
15. If sec - tano then lies in the
2
(A) first quadrant (B) second quadrant
(C) third quadrant (D) fourth quadrant
If cos 0 + sin 0 = V2 cos 0, then
cos - sin 0 =
(A)
I sin A​

Answer 1

Answer:

Step-by-step explanation:

cosa+sina=V2cosa

=square on both sides

=1+2sinacosa=2cos^2a

=2sinacosa=2cos^2a-1

=sin2a=cos2a

cosa-sina

square

=1-2sinacosa

=1-cos2a

=1-2cos^2+1

=2-2cos^2

=2(1-cos^2)

=2(sin^2)

=2sin^2

take root then

=V2sina

then cosa-sina=V2sina