Q. 55.0( 3 Votes )

If cos40o = p, then write the value of sin 40o in terms of p.

Answer :

We know that

cos2 θ + sin2 θ = 1


cos2 40° + sin2 40° = 1


sin2 40° = 1 – cos2 40°


sin 40° = (1 cos2 40°)


And Given that cos 40° = p


sin 40° = √(1– p2)


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