Math, asked by adasrh5535, 10 months ago

பி‌ன்வரு‌ம் சம‌ன்பாடுகளை ச‌ரிபா‌ர்‌க்க

sin^2 60°+cos^2 60°=1 1+tan^2 30°=sec^2 30°

Answers

Answered by TheOdd1sOut
0

Answer:

Step-by-step explanation:

English plz....

Answered by steffiaspinno
0

‌விள‌க்க‌ம்:

$ \text { (i) } \sin ^{2} 60^{\circ}+\cos ^{2} 60^{\circ}=1

L.H.S  =  $ \sin ^{2} 60^{\circ}+\cos ^{2} 60^{\circ}=\frac{1}{2}

$ \left[\sin ^{2} 60^{\circ}=\frac{\sqrt{3}}{2}+\cos ^{2} 60^{\circ}=\frac{1}{2}\right]

$ =\left(\frac{\sqrt{3}}{2}\right)^{2}+\left(\frac{1}{2}\right)^{2}

$ =\frac{3}{4}+\frac{1}{4}

$ =\frac{3+1}{4}

$ =\frac{4}{4} =  1  = R.H.S

L.H.S  = R.H.S

$ ii) 1+\tan ^{2} 30^{\circ}=\sec ^{2} 30^{\circ}

L.H.S = $ 1+\tan ^{2} 30^{\circ}

        $ =1+\frac{1}{3}                               $ \therefore \tan 30^{\circ}=\frac{1}{\sqrt{3}}

         $ =\frac{3+1}{3}

          $ =\frac{4}{3}

          $ =\sec ^{2} 30^{\circ}

$ \sec 30^{\circ}=\frac{2}{\sqrt{3}}  $ \sec ^{2} 30^{\circ}=\frac{4}{2} = R.H.S

       L.H.S  = R.H.S

$ 1+\tan ^{2} 30^{\circ}=\sec ^{2} 30^{\circ} என ‌‌‌‌நிரூபி‌க்க‌ப்ப‌ட்டது.

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