1.

If A=15° evaluate 4 sinA cos 2A tan3A-1​

Answer»

A=15°

4 \sin(a)  \cos(2a)  \tan(3a)  - 1

= 4 \times  ( - 4.2763) \times (0.6502) \times (1.6197)

=  - 0.3500



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