Davemikkoviz
Davemikkoviz
Math
Answered
tan x sin x + cos x = sec x
Sagot :
Cheahjimmyviz
Cheahjimmyviz
show that tan x sin x + cos x = sec x
tan x sin x + cos x / tan x = sin x/cos x
= sin x/cos x . sin x + cos
= sin² x/cos x + cos x / lcm = cos x
= ( sin² x + cos² x)cos x / sin² x+ cos² x = 1
= 1/cos x
= sec x
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