8 sin square x + 3 cos square x is equal to 5 then cos x is equal to
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8sin²x+3cos²x=5×1
8sin²x+3cos²x=5(sin²x+cos²x)
8sin²x-5sin²x+3cos²x=5cos²x
3sin²x+3cos²x=5cos²x
3(sin²x+cos²x)=5cos²x
3×1=5cos²x
3/5=cos²x
cosx=+-√3/√5(ans)
8sin²x+3cos²x=5×1
8sin²x+3cos²x=5(sin²x+cos²x)
8sin²x-5sin²x+3cos²x=5cos²x
3sin²x+3cos²x=5cos²x
3(sin²x+cos²x)=5cos²x
3×1=5cos²x
3/5=cos²x
cosx=+-√3/√5(ans)
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