_:n4bcb4c43fbfa44b1ae790427900bf867xb0
<http://schema.org/isFamilyFriendly>
"True"
<https://www.doubtnut.com/question-answer/if-s-inalphas-inbeta-cosalphacosbeta-10-then-prove-that-1-cotalphatanbeta0-22481>