Question

find the values of :

1. sin1380
2. sin1200
3. secent225
4. tan(-855)
5. secent210
6. cot(-300)

please give ans step by step​

Answer 1

Answer:

1) Sin (1380) = Sin (4*360 - 60)

=> - Sin 60

=> -√3/2

2) Sin (1200) = Sin (3*360+120)

=> Sin 120

=> Sin (90 + 30)

=> Cos 30

=> √3/2

3) Sec (225) = Sec (180 + 45)

=> - Sec 45

=> -√2

4) tan (-855) = tan ( -3*360 + 225)

=> tan 225

=> tan (180 + 45)

=> tan 45

=> 1

5) Sec (210) = Sec (180 + 30)

=> - Sec 30

=> -2/√3

6) Cot (-300) = ( -360 + 60)

=> Cot 60

=> 1/√3

Answer 2

Answer:

Thanks

1) Sin (1380) = Sin (4*360 - 60)

=> - Sin 60

=> -√3/2

2) Sin (1200) = Sin (3*360+120)

=> Sin 120

=> Sin (90 + 30)

=> Cos 30

=> √3/2

3) Sec (225) = Sec (180 + 45)

=> - Sec 45

=> -√2

4) tan (-855) = tan ( -3*360 + 225)

=> tan 225

=> tan (180 + 45)

=> tan 45

=> 1

5) Sec (210) = Sec (180 + 30)

=> - Sec 30

=> -2/√3

6) Cot (-300) = ( -360 + 60)

=> Cot 60

=> 1/√3