Question

Write all types of formulas of trigonometry of class 10th.

Answer 1

sin(A+B)=sinAcosB +cosAsinB

Answer 2

Answer:

Step-by-step explanation:

1) sin²x + cos²x = 1

  ⇒sin²x = 1 - cos²x

  ⇒cos²x = 1 - sin²x

2) 1 + tan²x = sec²x

  ⇒tan²x = sec²x - 1

3) 1 + cot²x = cosec²x

  ⇒cot²x = cosec²x - 1

4) sin(90-x) = cosx

5) cos(90-x) = sinx

6) tan(90-x) = cotx

7) cot(90-x) = tanx

8) cosec(90-x) = secx

9) sec(90-x) = cosecx

that's it..hope it helps