In - ABC- if a -3- b -4- c -5- then sin 2 B -A- 4-3B- 5-20C- 24-25D- 1-50

The correct option is C 24/25 cos B = 9 + 25 16/2.3.5 = 18/2.3.5 = 3/5⇒ sin B = 4/5 Therefore sin 2B = 2.4/5. 3/5 = 24/25. ...

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Sum of n Terms in GP

In Δ ABC, if ...

Question

In $Δ A B C, i f a = 3, b = 4, c = 5, t h e n s i n 2 B =$

$\frac{4}{5}$

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$\frac{3}{20}$

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$\frac{24}{25}$

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$\frac{1}{50}$

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In $Δ A B C, i f a = 3, b = 4, c = 5, t h e n s i n 2 B =$

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c = 5

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A B C, a = 3, b = 4

c = 5

sin A + sin 2 B + sin 3 C

(\frac{a}{2} + \frac{b}{3} - \frac{c}{4}); (\frac{2 a}{3} + \frac{3 b}{4} - \frac{4 c}{5})

(a + b + c)

$I f c o s^{4} A - s i n^{4} A = \frac{3}{5}, t h e n 2 c o s^{2} A - 1$ = ?

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