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grigory [225]
3 years ago
12

Please solve this urgently

Mathematics
1 answer:
xxMikexx [17]3 years ago
4 0

Answer:

Construction:~Join~A,C~and~P,Q.~AC~and~BE~intersect~at~G

                         and~PQ~and~BE~intersect~at~H

BG⊥AC~and~AG=GC [BG~is~bisector~of~

In~right~angled~triangle~ABG,\\sinABG = \frac{AG}{AB}\\or, sin15^o = \frac{AG}{x}\\or, AG = xsin15^o=GC\\Also,~PH=HQ=xsin15^o [APHG ~and~ GHQC~ are~congruent~rectangles.]\\In~right~angled~triangle~PBH,\\  sinPBH = \frac{PH}{PB}\\ or, sinPBH = \frac{xsin15^o}{10} \\Now,\\cosPBQ = cos[2(PBH)]~~~~~[

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