plz help me to solve question 3 .....from trigonometry...
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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
Hope it helps !
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
Hope it helps !
priyajoshi13:
thanx
in which class
10
....
hii varun ...class nhu batai
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