find the value of sin(-15π/4) is (a) 1/2 (b) √3/2 (c) 1/√2 (d) none
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The National Council of Educational Research and Training (NCERT) is an autonomous organisation of the Government of India which was established in 1961 as a literary, scientific and charitable Society under the Societies' Registration Act (Act XXI of 1860).
Established: 1961
Director: Dr. Hrushikesh Senapaty
President: Ramesh Pokhriyal (Minister of Education)
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above answer is correct ✔️✅
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