Non proportional it should be
Answer:
148°
Step-by-step explanation:
it is very close to the 150 line and the option closest to 150 is 148
Step-by-step explanation:
L.H.S=(1-cosB)(1+cosB)
=(1-cos^2B). {using (a+b) (a-b)=(a^2-b^2)in second step}
=sin^2B
=1/cosec^2B
Therefore,L.H.S=R.H.S proved
1. C
2.A
Hope this helps, good luck :D
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