10.

Mathematics

2 answers:

bagirrra123 [75]3 years ago

8 0

Need help on this tooo someone help me please

Misha Larkins [42]3 years ago

3 0

Answer:

{_6, _3, _1,0,1,3,6}

Step-by-step explanation:

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What is the solution to the following 21+x=13

Hitman42 [59]

Answer:x=-8

Step-by-step explanation:subtract 21 from both sides then simplify 31-21 to -8

7 0

4 years ago

Tan 0 = -2, 0

julsineya [31]

Answer:

Sin O = $\frac{2\sqrt{5} }{5}$

Cos O = $-\frac{\sqrt{5} }{5}$

Cot O = $-\frac{1}{2}$

Csc O = $\frac{\sqrt{5} }{2}$

Sec O = $-\sqrt{5}$

Step-by-step explanation:

Do you know the definitions of all the trig functions? If not, you need to memorize them. Also, you need to memorize which functions are positive in each quadrant. All functions are positive in quad I, sine and reciprocal are positive in quad II, tan and reciprocal are positive in quad III, and cos and reciprocal are positive in quad IV. OK?

Tan of an angle is opposite side/adjacent side of a right triangle

If the tan O = - 2. let the opp. side = 2 and adjacent side = 1. Then the hypotenuse = $\sqrt{2^{2} + 1^{2} } = \sqrt{4 + 1} = \sqrt{5}$