Question

If sin( 90-theta)× cos theta=1 ,the value of theta

Answer 1

Answer:

hope this answer helps

Answer 2

Answer:

0

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°