How many triangles can have their three angles as 30o,60o, and 90o?
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Q4
4(sin430o+cos460o)−3(cos445o−sin290o)
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Q5
Expert (Science ) kindly provide the solution:- Q. The angle of refraction of a prism is 60o. It is producing min. deviation of 30o. The angle of incidence is - (A) 15o (B) 30o (C) 45o (D) 60o