Question

The value of tan 855º =
​

Answer 1

Answer:

Answer:

-1

Explanation:

For any degree over 360, subtract intervals of 360 off until it is less, for example

855−360= 495 − 360=135

So you are looking for

tan (135) this is halfway between 90 and 180 degrees. This means it behaves like 45 degrees, but with cos being the negative of cos(45) , since

tan(45)is 1

tan (135) is -1

Step-by-step explanation:

Answer 2

Answer:

Tan 855 =tan(2×360+135)……. …….=tan(135)(Tan 360+teta =tan teta360+ first quadrant all are positive )

Tan 135= tan (90+45)…………….=-cot 45 ( tan 90-teta =cot teta and tan 90+teta =-cot teta) (90+is in second quadrant tan is negative in 2nd quadrant)-cot 45= -1

Therefore, tan855=-1

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Step-by-step explanation:

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