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CBSE Class 12-science Answered

What is the ans to this question??
question image
Asked by tv2000in | 28 May, 2019, 12:02: AM
answered-by-expert Expert Answer
I n space t r i a n g l e space O S Q comma space angle O Q S equals 90 degree space... space sin c e space a space l i n e space d r a w n space f r o m space c e n t r e space t o space t h e space c h o r d space b i s e c t s space i t A l s o comma space i n space triangle O S P comma space angle O S P equals 90 degree space a n d space angle O P S equals 1 half angle S P T equals 15 degree I n space triangle P S T comma space angle S P T equals 30 degree space a n d space S P equals S T rightwards double arrow angle P S Q equals angle P T Q rightwards double arrow 2 angle P S Q equals 180 degree minus 30 degree rightwards double arrow angle P S T equals 75 degree equals angle P T S T h e r e f o r e comma space angle O S Q equals 90 degree minus P S Q equals 15 degree I n space triangle O Q S comma cos 15 degree equals fraction numerator Q S over denominator O S end fraction equals fraction numerator Q S over denominator 3 end fraction rightwards double arrow Q S equals 2.8977 S T equals 2 cross times Q S equals 5.7955 equals 5.8
Answered by Renu Varma | 28 May, 2019, 10:22: AM

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CBSE 12-science - Maths
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