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2 years ago

Can someone Help me thanks

Mathematics

1 answer:

SashulF [63]2 years ago

6 0

The correct answer is C: SU, TU, ST.

If you observe the measurement of each of the given angles, the larger the angle, the longer the opposite side it forms. That’s why < U has the longest opposite side (side ST). The smaller the angle, the shorter the opposite side it forms.

Hope this explanation helps.

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Step-by-step explanation:

15. $\frac{cotx+1}{cotx-1} = \frac{cotx+cotx.tanx}{cotx-cotx.tanx} = \frac{cotx(1+tanx)}{cotx(1-tanx)} = \frac{1+tanx}{1-tanx} \\$

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=> The clause is correct

17. Do the same (16)

18. $\frac{sinx}{1-cosx}+\frac{sinx}{1+cosx} = \frac{sinx(1+cosx) + sinx(1-cosx)}{(1+cosx)(1-cosx)} = \frac{sinx + sinx.cosx + sinx - sinx.cosx}{1-cos^{2}x} = \frac{2sinx}{sin^{2}x }= \frac{2}{sinx} = 2cosecx$

19.

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20. Do the same (18)

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Same with (16) => Left = Right => The clause is correct

22. Do the same (21)

Too long, i'm so lazy :))))

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