If sin( 90-theta)× cos theta=1 ,the value of theta
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Step-by-step explanation:
sin(90-theta)=cos theta
cos theta × cos theta = 1
cos^2 theta = 1
But cos0°=1
therefore, cos^2 theta = cos 0°
we know that theta = 0° in the RHS
If we take theta as 0° in LHS,
cos^2 theta = cos theta × cos theta
= cos 0° × cos 0°
= 1 × 1
= 1
Thus value of theta is is 0°
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