No, mistake at s2, if there was 0x then they shouldn’t have written anything at all because there are 0 x’s!!!
Hello,
Al 'Kashi theorem says:
a²=4²+7²-2*4*7*cos 20°=12.37721...
==>a=3.518126381...≈3.5 ==>False.
Answer:
B
Step-by-step explanation:
Given
sinΘ = , then
Θ = ( ) = 45° → B