Listen NCERT Audio Books - Kitabein Ab Bolengi
Choose the correct option and justify your choice:
(i)
=
Out of the given alternatives, only sin 60° =
Hence, (A) is correct
Evaluate the following:
(ii)
(iii)
(iv)
(v)
Sin 2A = 2 sin A is true when A =
If and find A and B
State whether the following are true or false. Justify your answer
(i) Sin (A + B) = sin A + sin B
(ii) The value of sin θ increases as θ increases
(iii) The value of cos θ increases as θ increases.
(iv) Sin θ = cos θ for all values of θ.
(v) Cot A is not defined for A = 0°