1.

- TA20°, evaluate :3 sin3A +2cos (2A+5°)2cos3A-sin (2A-100)

Answer»

3sin60+2cos45/2cos60-sin30nowsin60=√3/2cos45=1/√2cos60=1/2sin30=1/2hence put in the values3√6+4/2√2*2=3√3+2√2

thank u



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