Question

Given that cos x° =Sin (3x +10)
find tan X°​

Answer 1

the answer is tan 20 =0.364

Explanation:

we can write sin(3x+10)= cos{90-(3x+10)}

now

cosx= cos{90-(3x+10)}

eliminating cos from both sides we get

x=90-3x-10

4x=80

x=20

tan 20=0.364

it can be 40 also

if we take the sin part