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Ad libitum [116K]
3 years ago
10

Find the Missing angle ​

Mathematics
2 answers:
pashok25 [27]3 years ago
4 0

Answer:

50

Step-by-step explanation:

70+60 =130

180-130 = 50 degrees

lakkis [162]3 years ago
3 0

Answer: 50

Step-by-step explanation: Every triangle is 180 degrees so add the 60 and the 70 to get 130. 180-130=50. So 50 is your answer.

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2 years ago
16) Please help with question. WILL MARK BRAINLIEST + 10 POINTS.
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We will use the sine and cosine of the sum of two angles, the sine and consine of \frac{\pi}{2}, and the relation of the tangent with the sine and cosine:

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\cos\left(x+\dfrac{\pi}{2}\right) = \cos x \cdot \cos\dfrac{\pi}{2} - \sin x\cdot\sin\dfrac{\pi}{2} = \cos x \cdot 0 - \sin x \cdot 1 = -\sin x

Hence:

\tan \left(x+\dfrac{\pi}{2}\right) = \dfrac{\sin\left(x+\dfrac{\pi}{2}\right)}{\cos\left(x+\dfrac{\pi}{2}\right)} = \dfrac{\cos x}{-\sin x} = -\cot x
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