Home
Class
GUIDANCE
If B=30^(@) then prove that cos3B=4 cos^...

If B=30^(@) then prove that cos3B=4 cos^(3)B-3 cosB | 10 | Trigonometric Ratio MATHS | Das...

Promotional Banner

Similar Questions

Explore conceptually related problems

ig sin B=(1)/(2) then prove that 3cos B-4cos^(3)B=0

If 3tanA tanB=1 , then prove that 2cos(A+B)=cos(A-B)

If 3tan A tan B=1, prove that 2cos(A+B)=cos(A-B)

If sin B = 0.5, find the value of 3 cos B-4cos^(3)B

If cos B=(1)/(3), find the other five trigonometric ratios.

In o+ABC, prove that cos A+cos B+cos C<=(3)/(2)

If A+B+C=180^0 , prove that : cos^2 A + cos^2 B + cos^2 C + 2cosA cosB cosC=1 .

If A+B+C=pi , prove that : cosA + cosB-cosC=4cos(A/2) cos(B/2) sin(C/2) -1

If A+B+C=2pi , prove that : cos^2B+cos^2C-sin^2A-2cosA cosB cosC=0 .