¢20, 7 sind = दर है तो दिखाइए 3 ८054 -4 ८

1.	¢20, 7 sind = दर है तो दिखाइए 3 ८054 -4 ८०57 4 ल01न का
Answer» By this right angled triangle we have, sinA=1/2 cosA=√3/2 so cos^3(A) = 3√3/8 substituting these values we get 3cosA-4cos^3(A) = 3√3/2–43√3/8 =(3√3/2) – (3√3/2) = 0 And hence it is proved Like my answer if you find it useful!

¢20, 7 sind = दर है तो दिखाइए 3 ८054 -4 ८०57 4 ल01न का

Answer»

By this right angled triangle

we have,

sinA=1/2

cosA=√3/2

so cos^3(A) = 3√3/8

substituting these values we get

3cosA-4cos^3(A)

= 3*√3/2–4*3√3/8

=(3√3/2) – (3√3/2)

= 0

And hence it is proved

Like my answer if you find it useful!