Question

pls ans it fast tommorow is my maths board exam and this is one of the question in the exam final paper of board 10 ​

Answer 1

Answer:

Step-by-step explanation:

cos-sin =√2 sin

squaring both sides

(cos-sin)²= (√2sin)²

cos²+sin²-2cossin = 2sin²

cos²= 2sin²-sin²+2 cos sin

cos² = sin²+2cos sin

Adding cos both sides

cos²+cos² = sin²+2cos sin +cos²

2cos² = (sin+cos)²

√(2cos²) = sin +cos

√2 cos = cos + sin

as given in the question we have to prove that cos-sin=√2 sin u have to use the same method as given above

my exam is tomorrow so wish me luck! and all the best to u too if ur exam is tomorrow!

Hope it helps !

all the best for ur exam :D

Answer 2

Here is the solution
Hope it helps