19. Without using trigonometric table, evaluate the following:
cos? 50° + cos2 40°
+ 2cosec? 58° - 2cot 58º tan 32 – 4tan 13ºtan 37° tan 530 tan 77°
sec? 70° - cot? 20°
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Answer:
The question is incomplete....There is an arithmetic sign missing after tan 77
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