1.

30. cos™30" cos’45" + dsec’ 4 + है os'90" 20060 =2

Answer»

cos30= √3/2cos45= 1/√2cos60= 1/2sin30= 1/2sin60= √3/2tan 60= √3

so3/4*1/2+4(4)+1/2(0)-2(3)

3/8+16-63/8+1083/8



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