Q. 64.6( 5 Votes )

Find the value of

(i) (ii)

(iii) (iv)

(v) (vi)

(vii) (viii)

(ix) sin 54° – cos 36° (x)

(xi) cosec 31° – sec 59° (xii)

(xiii)

Answer :

(i) [ cos θ = sin (90° - θ)]


(ii) [ cos θ = sin (90° - θ)]


(iii) [ Sin θ = cos (90° - θ)]


(iv) [ Sin θ = cos (90° - θ)]


(v) [ Sin θ = cos (90° - θ)]


(vi) [ Sin θ = cos (90° - θ)]


(vii) [ cos θ = sin (90° - θ)]


(viii) [ cos θ = sin (90° - θ)]


(ix) sin 54° - sin(90° - 36°) [ cos θ = sin (90° - θ)]


sin 54° - sin 54°


0


(x) [ tan θ = cot (90° - θ)]


(xi) cosec 31° - cosec(90° - 59°) [ sec θ = cosec (90° - θ)]


cosec 31° - cosec 31°


0


(xii) [ Sin θ = cos (90° - θ)]


(xiii) [ tan θ = cot (90° - θ)]


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