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In A B C , prove that (a-b)^2cos^2C/2+(...

In ` A B C ,` prove that `(a-b)^2cos^2C/2+(a+b)^2sin^2C/2=c^2dot`

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To prove that \[ \frac{(a-b)^2 \cos^2 \frac{C}{2} + (a+b)^2 \sin^2 \frac{C}{2}}{c^2} = 1 \] we will start with the left-hand side (LHS) and manipulate it step by step. ...
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CENGAGE ENGLISH-TRIGONOMETRIC FUNCTIONS-All Questions
  1. In A B C ,= if (a+b+c)(a-b+c)=3a c , then find /Bdot

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  2. In A B C , prove that (a-b)^2cos^2C/2+(a+b)^2sin^2C/2=c^2dot

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  3. If the angles A,B,C of a triangle are in A.P. and sides a,b,c, are in ...

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  4. If a=sqrt(3),b=1/2(sqrt(6)+sqrt(2))dot and c=2, then find /A

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  5. In a scalene triangle A B C ,D is a point on the side A B such that C ...

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  6. In a "DeltaA B C","\ "/"C"=60"\ "&\ /A=75. If D is a point on A C such...

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  7. In a triangle A B C ,/A=60^0a n db : c=(sqrt(3)+1):2, then find the va...

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  8. A tower subtends angles alpha,2alpha,3alpha respectively, at point A ,...

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  9. In a triangle, if the angles A , B ,a n dC are in A.P. show that 2cos1...

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  10. If in a triangle A B C ,/C=60^0, then prove that 1/(a+c)+1/(b+c)=3/(a+...

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  11. Perpendiculars are drawn from the angles A, B and C of an acute-angled...

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  12. If in triangle A B C , the median A D and the perpendicular A E from t...

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  13. If pa n dq are perpendicular from the angular points A and B of A B C...

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  14. The two adjacent sides of a cyclic quadrilateral are 2 and 5 and the a...

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  15. In a circle of radius r , chords of length aa n dbc m subtend angles t...

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  16. If I is the incenter of A B Ca n dR1, R2,a n dR3 re, respectively, th...

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  17. In A B C , as semicircle is inscribed, which lies on the side cdot If...

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  18. Given the base of a triangle, the opposite angle A, and the product k^...

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  19. In any /\ A B C , prove that (b^2-c^2)cotA+(c^2-a^2)cotB+(c^a-b^2)cot...

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  20. In triangle ABC, angle A is greater than angle B. If the measure of an...

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