Question

Find A if : tan 3 A = sin 45. cos 45 + sin 30
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Answer 1

Answer:

15 degree

Step-by-step explanation:

tan 3 A = 1 / $\sqrt{2\\}$ . 1 / $\sqrt{2\\}$  + 1 / 2

tan 3 A = 1 / 2 + 1 / 2

tan 3 A = 1

But, tan 45 = 1

so, tan 3 A = 45

3 A = 45

A = 45 / 3

A = 15 degree