Solution of Triangles

Question

Q1)If in a triangle, a= 6, b= 3 and cos(A-B)=4/5, then find its area? Q2)Let the angles of a A,B,C of a triangle ABC be in A.P.and let b:c=under root(3):under root(2).Find the angle A?

Arjun Blouria · Accepted Answer

cos(A-B)=4/5 therefore, 1-tan2(A-B)/2 = 4/5 1+tan2(A-B)/2 By componendo dividendo, 2tan2(A-B) = 5-4 2 5+4

Trigonometry> Solution of Triangles...

Q1)If in a triangle, a= 6, b= 3 and cos(A-B)=4/5, then find its area? Q2)Let the angles of a A,B,C of a triangle ABC be in A.P.and let b:c=under root(3):under root(2).Find the angle A?

Devesh Lall , 13 Years ago

Arjun Blouria

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In ABC, if cot A+cot B+cot C = cosecA cosecB cosecC, then prove that ABC is right angle triangle.

trigonometry

Find the general solution of equation tan3∂=cot2∂
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To prove : Cosec(45 degree - A)Cosec(45 degree + A) = 2SecA

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Derive a formula for the area of the triangle, given b, A, B, and C. That is, derive the formula: (b^2sinAsinC)/(2sinB)

trigonometry

Trigonometry> Solution of Triangles...

Q1)If in a triangle, a= 6, b= 3 and cos(A-B)=4/5, then find its area? Q2)Let the angles of a A,B,C of a triangle ABC be in A.P.and let b:c=under root(3):under root(2).Find the angle A?

Devesh Lall , 13 Years ago

Arjun Blouria

LIVE ONLINE CLASSES

Other Related Questions on trigonometry

In ABC, if cot A+cot B+cot C = cosecA cosecB cosecC, then prove that ABC is right angle triangle.

trigonometry

Find the general solution of equation tan3∂=cot2∂For all angles between -720 and +720

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To prove : Cosec(45 degree - A)Cosec(45 degree + A) = 2SecA

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cos^2 13ºcos^2 47º+cos^2 73º =? …..................

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Derive a formula for the area of the triangle, given b, A, B, and C. That is, derive the formula: (b^2sinAsinC)/(2sinB)

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Find the general solution of equation tan3∂=cot2∂
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